C. B. D. C. D. 2 NaOH NaCl Na 2 CO3 NaOH Na 2 CO3 Acid Base Practice Test. 21. A basic solution 1 21. A A.basic tastes sour. solution B. feels slippery. A. does tastesnot sour. C. conduct electricity. B. feels slippery. D. reacts with metals to release oxygen gas. C. does not conduct electricity. D. reacts with metals to release oxygen gas. 2 22. The balanced formula equation for the neutralization of H 2SO 4 by KOH is 22. The the neutralization of H 2SO 4 by KOH is A. balanced H 2SO 4 +formula KOH equation → KSOfor 4 + H2O B. H 2SO 4 + KOH → K 2SO 4 + H 2 O A. Arrhenius H 2SO 4 + base KOHis defined → KSO H2O 23. An as 4a +substance which C. H 2SO 4 + 2KOH → K 2SO 4 + H 2 O B. H 2SO 4 + KOH → K 2SO 4 + H 2 O 23. An base is defined A. Arrhenius donates 2KOH → K as SOa substance + 2H 2 O which D. H SO +protons. C. H22SO44 + 2KOH → K 22SO 44 + H 2 O B. donates electrons. 3 23. An A. Arrhenius donates protons. 2KOH → K asSO + 2H 2 O which D. H 2SO 4 + base is defined a substance C. produces H + in solution.2 4 B. donates electrons. A. protons. D. donates produces OH − in solution. C. produces H + in solution. B. donates electrons. − in solution. D. produces OH + C. produces H in solution. produces OH − in solution. 24. D. Consider the following equilibrium: 4 24. Consider the following equilibrium: − − HS + H 3PO 4 → ← H 2S + H 2 PO 4 → H 2S + H 2 PO 4 − 24. Consider the following equilibrium: HS− + acids H 3POand 4 ← The order of Brönsted-Lowry bases- 6is→ HS− + acids H 3POand H 2Sis+ H 2 PO 4 − A. order acid, base, acid, base. The of Brönsted-Lowry bases 4 ← - 6B. acid, base, base, acid. A. acid, base, acid, The Brönsted-Lowry C. order base, of acid, acid, base. base. acids and bases is B. acid, base, base, D. base, acid, base, acid. acid. A. C. acid, base,base, acid, acid, acid, base. base. B. D. acid, base,base, acid, base, base, acid. acid. C. base, acid, acid, base. 5 25. D. acid,representing base, acid. the reaction of ethanoic acid with water is The base, equation − − 25. The reaction of ethanoic acid with water is + H2O → A. equation CH 3COOrepresenting ←theCH 3COOH + OH − 2− + → − + H2O → B. equation CH 3COO COO CH + H 3O − acid with water is 25. The representing theCH reaction ← 2 COOof ethanoic + H2O ← A. CH 3 3COOH + OH − + → − +H O → C. CH CH 3COO COOH CH 3COO 2−+ H 3O + ← CH − + H 22O → B. COO + H O − ← 3 2 3 A. CH 3COO + H 2 O ← CH 3COOH ++OH − → D. CH CH 3COOH COOH +H O → CH 3COO COOH − 2 + OH + ← CH − + H 22O → C. 2− + ← 3 3 B. CH 3COO + H 2 O ← CH +HH33OO + 2 COO + − → D. CH CH 3COOH COOH ++ H H 2O O→ CH 3COO COOH − 2 + OH ← CH C. + H 3O + ← 3 2 3 + − → CH 3COOH + H 2 Oequilibrium: ← CH 3COOH 2 + OH 26. D. Consider the following + − 26. Consider the following equilibrium: 2H 2 O( l ) + 57 kJ → ← H 3O ( aq ) + OH ( aq ) + − → 26. Consider the following equilibrium: kJwater ← H 3O ( aq ) + OH ( aq ) 2 O( l ) + 57 When the temperature is2H decreased, the + − → kJ water 2H 2 O ← H 3O ( aq ) + OH ( aq ) ) + 57the When the temperature O + ( lincreases. A. stays neutral and isHdecreased, C. D. − + CH 3COOH + H 2 O → ← CH 3COO + H 3O + − CH 3COOH + H 2 O → ← CH 3COOH 2 + OH 6 26. Consider the following equilibrium: + − 2H 2 O( l ) + 57 kJ → ← H 3O ( aq ) + OH ( aq ) When the temperature is decreased, the water [ ] B. stays neutral and [ H O ] decreases. C. becomes basic and H O decreases. 27. In a solution at 25°C, the[ [H O] ] is 3.5 × 10 M. The [OH ] is D. becomes acidic and [ H O ] increases. 27. A. In a solution the [H O ] is 3.5 × 10 M. The [OH ] is M 3. 5 × 10 at 25°C, 7 27. B. 9 × 10 atM25°C, the H O is 3.5 × 10 M. The OH is In a 2. solution [ ] [ ] A. 3. 5 × 10 M A. stays neutral and H 3O + increases. + 3 3 −20 −9 −20 −7 1. 0 × 10 −9M 2. 9 × 10−6−20M 3.3.55××10 10 MM 1. 0 × 10 −7−9M 2. 9 × 10 M 3. 5 × 10 −6−7M C. B. D. A. C. B. D. C. 1. 0 × 10 M + 3 + −6 − + −6 − + 3 3 3 + −6 OVER - 7- [ ] 8 28. In a solution with a pOH of 4.22, the OH is [ ] A. 1. 7 × 10 M 0 × 10 M a pOH of 4.22, the OH is 28. B. In a 6. solution [ ] M A. 1. 7 × 10 with −6 3. 5 × 10with Ma pOH of 4.22, the OH − is 28. InD.a solution −10 −5 −10 6.3 × 10 −1−5M 6. 0 × 104 −10M 1.1.77××10 10 M M 6.3 × 10 −1−5M 6. 0 × 10 M 1. 7 × 10 4−1 M C. B. D. A. C. B. D. C. 6.3 × 10 M 9 29. An aqueous solution D. 1. 7 × 10 4 M of NH 4 CN is − − − 29. A. An aqueous solutionKofa <NH basic because K b4 CN is B. basic because K a > K b basic because K b CN is 29. A. An aqueous solutionKof a <NH C. acidic because K a < K b 4 B. basic because K a > K b D. A. acidic basic because KK ><KK C. acidic because Kaaa < Kbbb B. basic because K a > K b D. acidic because K a > K b C. acidic because K a < K b 30. The ionicbecause equationKfor D. net acidic K b predominant hydrolysis reaction of KHSO 4 is a >the − equation→ 30. A. The net ionic for SO the42− predominant + H 3O + hydrolysis reaction of KHSO 4 is HSO ← 4 + H2O − → H Hthe OH −+ hydrolysis reaction of KHSO is 2− ← 4− + 2O 2 SO 4 ++H → 30. B. The HSO net ionic equation for predominant + H O SO O A. HSO 4 ← +4 4 2 2−3 + C. KHSO−4 + H 2 O → K + SO + H O → B. HSO 4 −+ H 2 O ← H 2SO2−4 +4 OH −+ 3 ← → + 4 − + H O +H O A. HSO → ← KSO D. KHSO44 + H 22O ← 2−43 + OH + + + H 2 SO C. KHSO−4 + H 2 O → K + SO + H O ← 4 3 − B. HSO 4 + H 2 O → ← H+2SO 4 + OH → D. KHSO 4 + H 2 O ← K ++ H 2SO2−4 + OH −+ → C. KHSO 4 + H 2 O ← K + SO 4 + H 3O + − D. KHSO 4 + H 2 O → ← K + H 2SO 4 + OH B. basic because K a > K b C. acidic because K a < K b D. acidic because K a > K b 10 30. The net ionic equation for the predominant hydrolysis reaction of KHSO 4 is − + H2O → SO 42− + Hfor A. HSOthe ←equilibrium 4 + 3Oan indicator: 31. Consider following − B. HSO 4− + H 2 O → ← H 2SO 4 + OH +− + H O + HInd+ + H 2 O2−→ 3 C. KHSO 4 + H 2 O → + HInd ← K + SO 4 ← 3O 31. Consider the following → equilibrium for an indicator: − D. KHSO + H 2 O ←equilibrium K + + H 2SO + OH 31. Consider the4 following for4 an indicator: At the transition point, − → HInd + H 2 O for Indindicator: + H 3O + 11 ← an 31. Consider the following equilibrium − → HInd + H 2 O ← Ind − + H 3O + A. [ HInd ] > Ind At the transition point, − + − HInd + H 2 O → B. the[ HInd ] = Ind ← Ind + H 3O At transition point, −− A. ]]>< Ind C. the[[HInd HInd Ind At transition point, A. [ HInd ] > Ind− − + B. D. [[HInd HInd]]== Ind H 3O −− A. B. [ HInd HInd] >= Ind Ind C. [ HInd ] < Ind − B. C. HInd HInd =< Ind −− D. [ HInd ] = H O + [ ] [ ] [[ ] ] [[[ ] ] ] [[ ]] ]] [ ] [[ The C. D. equivalence HInd] <= [ Ind Hpoint O] ] in a titration is reached when 20.0 mL of H SO [ HInd to 20.0 mL of 0.420 M KOH. The [ H SO ] in the original solution is D. [ HInd ] = [ H O ] - 83 32. 32. 12 32. 32. 33. 13 33. 33. 33. 14 34. 34. 34. 34. 35. 35. 35. 3 3 −+ + 2 2 4 is added 4 The H 2SO 4 is added A. equivalence 0.00840 M point in a titration is reached when 20.0 mL of original is SO is added to mL M of 0.420 M KOH. The [ His2SO 4 ] in the B.20.0 0.210 The equivalence point in a titration reached when 20.0solution mL of H 2 4 C. 0.420 to mLM ofM0.420 M KOH. The [ H 2SO 4 ] in the original solution is A. 20.0 0.00840 The equivalence D. 0.840 M point in a titration is reached when 20.0 mL of H 2SO 4 is added B.20.0 0.210 to mLMofM 0.420 M KOH. The [ H 2SO 4 ] in the original solution is A. 0.00840 C. 0.420 M B. 0.840 0.210M M D. A. C. 0.00840 0.420 MM B. 0.210 In D. a titration 0.840 M Mbetween a weak acid and a strong base, the pH at the equivalence point is C. 0.420 M A.a titration 3 D. 0.840 Mbetween a weak acid and a strong base, the pH at the equivalence point is In B. 5 C. a titration A. 37 In between a weak acid and a strong base, the pH at the equivalence point is D. 59 B. In between a weak acid and a strong base, the pH at the equivalence point is C. 73 A.a titration D. B. 95 A. C. 37 B. 5 The D. pH 9 of 100.0 mL of 0.0050 M NaOH solution is C. 7 A. pH The of 100.0 mL of 0.0050 M NaOH solution is D. 9 2.30 B. 3.30 A. 2.30 C. pH 10.70 The of 100.0 mL of 0.0050 M NaOH solution is B. 3.30 D. 11.70 C. pH 10.70 The of 100.0 mL of 0.0050 M NaOH solution is A. 2.30 D. 11.70 B. 3.30 A. 2.30 C. 10.70 B. 3.30solution is prepared by adding 1.0 mol of NaCH 3COO to 1.0 L of 1.0 M CH 3COOH. A D.buffer 11.70 − C. 10.70 The molar concentration of by CHadding approximately A buffer solution is prepared of NaCH 3COO to 1.0 L of 1.0 M CH 3COOH. 3COO1.0ismol D. 11.70 − The molar concentration of CH 3COO is approximately A. 0.0 A B.buffer 0.5 solution is prepared by adding 1.0 mol of NaCH 3COO to 1.0 L of 1.0 M CH 3COOH. A. 0.0 − C. 1.0 A. 2.30 B. 3.30 C. 10.70 D. 11.70 15 [Cl– ] [Cl– ] C. D. 35. A buffer solution is prepared by adding 1.0 mol of NaCH 3COO to 1.0 L of 1.0 M CH 3COOH. +] The molar of CH 3COO − is approximately [Ag+ ] [Agconcentration A. B. C. D. 0.0 0.5 1.0 2.0 OVER 16 36. The equation for the reaction of Cl O -with 9 - water is 2 A. B. C. D. Cl 2 O + H 2 O Cl 2 O + H 2 O Cl 2 O + H 2 O Cl 2 O + H 2 O → ← → ← → ← → ← 2HClO – 2ClO + H[Cl 2 ] Cl 2 + H 2 O 2 Cl 2 + O 2 + H 2 17 20. The acid found in vinegar will 37. 21. 21. 18 21. 22. 19 38. 22. 22. 20 23. [Cl– ] Consider following redox reaction: A. taste the bitter. In which of the following equilibrium systems is HCO3− acting as a Brönsted-Lowry base? B. feel slippery. − + 2MnO + 2Mn 2+ + 3H 2 O C. change− litmus to blue. 4 + 5CH 3CHO + 6H → 5CH 3COOH − 2− + → acting as a Brönsted-Lowry base? In which of the following equilibrium systems is HCO A. CO3 H 3 D. HCO react 3with←MgHto +produce 2 − →electrons is 2− The species B. HCO − that + HSloses H S + CO3 A. HCO33− → H +←+ CO232− ← In which of the equilibrium systems is HCO3− acting as a Brönsted-Lowry base? − following − → C. HCO + H S H CO + HS A. HCO H 2 O 3 − + HS 2− 2 − ← 2 3 → B. ← H 2S ++ CO3 2− 3 − −− → + → 2− D. HCO O +→ A. CO3H 3O + CO3 − B. HCO MnO + HH C. HCO3−334− ← + H22S ← H 2 CO32−+ HS ← − → B. + HS H S + CO3 C. HCO CH 33CHO ← 2 2− D. HCO−3− + H 2 O→ → H 3O + + CO ← − 3 C. HCO + H S H CO + HS D. CH 33COOH ← 2 3 2 − → D. conjugate HCO3 + Hacid + CO32− The of H32O O+ is 2O ← -62− A spontaneous redox reaction occurs when a piece of iron is placed in 1.0 M CuSO The conjugate acid of H 2 O is 4. A. O The reducing agent is − B. OH The conjugate acid of H 2 O is 2− A. O + C. A. HFe 3O− 2− A. O B. OH2+ D. H B. OH Cu − 2 2O B. C. H 3O + + C. HH3O O C. D. H 22O2− 2 D. D. HSO 2 O42 The strongest acid that can exist in an aqueous solution is 23. The strongest acid that exist an aqueous solution is NH 2− acid 23. A. The strongest that cancan exist in aninaqueous solution is 39. Consider +the following redox reaction: B. H 3O− − A. NH NH2 2 C. HNO 3SO2 + 3H 2 O + ClO3− → 3SO 4 2− + 6H + + Cl − 2 B. HH33OO+ + D. HClO 4 C. C. HNO2 2 half-reaction is The HNO reduction D. HClO D. HClO4 4 A. ClO3− + 6H + → Cl − + 3H 2 O + 6e − 24. Which of the following is possible for an acid? B. ClO3− + 6H + + 6e − → Cl − + 3H 2 O 24. Which of the following is possible for an acid? 2− + 2H + 4H +for + 2e C. SO 24. Which of2 the following is4 possible an− acid? 2 O → SO ACID STRENGTH CONCENTRATION D. SO + 2H O + 2e − → SO 2− + 4H + pH B. C. D. H 3O HNO2 HClO 4 21 24. Which of the following is possible for an acid? ACID STRENGTH CONCENTRATION pH strong 0.01 M 2.0 A. B. weak 0.01 M 1.0 25. Consider the following equilibrium: C. strong 3M 5.5 + − 25. Consider the following 2H equilibrium: → 2 O( l ) ← D. weak 3 MH 3O ( aq ) + OH ( aq )–0.5 → H 3O + + OH − 2H 2 O( l ) to← When comparing the ( aqequilibrium ) ( aq ) is reestablished. A small amount of HCl is added water and 22 25. Consider the following equilibrium: new equilibrium with the original equilibrium, A small amount of HCl is added to water and equilibrium is reestablished. When comparing the → O +( aq ) + OH −( aq ) 2Hthe + 2 O( loriginal ) ← H 3equilibrium, new equilibrium with A. H 3O and pH both decreased. [ ] A small amount of HCl is added to water and equilibrium is reestablished. When comparing the pH B. and pH both both increased. decreased. A. [[HH OO ]] and new equilibrium with the original equilibrium, andincreased. pH decreased. C. and pH both B. [[HH OO ]] increased A. [ H O ] and pH both decreased. and pH increased. D. increased C. [H[HHOOO and pH both increased. decreased. B. [ ] ]]decreased and pH increased. D. [ H[ HO O] increased and pH decreased. C. ] decreased -733 3 3 33+ 33+ ++ ++ ++ OVER + + 3 3 D. [ H O ]+decreased and pH increased. [ [ 3 + ] ] 26. The H 3O in 100.0 mL of 0.015 M KOH is 23 in 100.0 mL of 0.015 M KOH is 26. The H 3O + −13 A. 6. 7 +× 10 26. The [ H 3O ] in 100.0 mL of 0.015 M KOH is B. 6. 7 × 10 −12 −13 A. 6. 7 × 10 −13−3 A. 6. 7 × 10 C. 1. 5 × 10 −12 B. 6. 7 × 10 B. 6. 7 × 10 −12−2 D. 1. 5 × 10 −3 −3 C. 1.1. × 10 C. 5 ×510 −2 −2 D. 1.1. × 10 D. 5 ×510 24 27. At any temperature, pK w is defined as 27. At any temperature, pK is defined as w 27. A. At any pK is defined as pKtemperature, w = pH + pOH w A. pK w = pH + pOH B. pK w = pH − pOH B. A. pK pKww == pH pH−+pOH pOH C. B. pK pK w == pH pH×−pOH pOH pK w w= pH × pOH pH C. pK pKw=w ==pHpH × pOH D. pK D. w pOH pOH pH D. pK w = pOH C. 28. The [ OH − ]− of a solution with pH 5.75 is 28. The OH of a solution with pH 5.75 is 28. [ ] M a solution with pH 5.75 is A. × 10 of The5.[6OH ] M A. 5. 6 × 10 B. 1.8 × 10 M − −9 −6 −9 −6 −1 −9 M B. 7.1.8 10 C. 6 ×6×10 M A. 5. × 10M −1 −1 C. 9.7.2 6× × D. 1010 MM −6 B. 1.8 × 10 −1 M C. pK w = pH × pOH D. pK w = pH pOH 25 28. The OH − of a solution with pH 5.75 is [ ] A. 5. 6 × 10 −9 M 29. The value of−6K b for HPO 42− is B. 1.8 × 10 M −1 for HPO 42− is 29. The −13bM C. 7. 10 A. value 2.62 ××of 10K −1 9. 29. D. The of K Mfor HPO 42− is B. value 6.22 ××10 10 −8 A. 2. 2 × 10 −13b C. 1. 6 × 10 −7 −8 2− 26 B. 6. 2 × 10 −13 29. The A. value 2. 2 ×of 10 K b for HPO 4 is D. 4. 5 × 10−7−2 C. −8 B. 1.6.62××10 10−13 −2 A. 2. 2 × 10 D. × 10 10 −7 C. 4. 1. 65 × B. 6. 2 × 10 −8 D. 4. of 5 × 10−7−2 30. C. Which -81. 6 × the 10 following 0.10 M solutions is basic? D. 5 ×the 10 −2 30. Which of following 0.10 M solutions is basic? A. 4. LiCl 27 B. K 3of PO 4 following 0.10 M solutions is basic? 30. A. Which LiCl the C. NaClO B. K 3PO 4 4 A. NH LiCl 30. Which of4the 0.10 M solutions is basic? D. NOfollowing 3 C. NaClO 4 B. K 3PO 4 A. NH LiCl4 NO3 D. C. NaClO B. K 3PO 4 4 D. NH 4the NO3 31. C. Consider equilibrium for the indicator HInd at its transition point: NaClO 4 following 28 D. NH NO − + 3 31. Consider4the following equilibrium the indicator HInd at its transition point: HInd + H 2 Ofor→ ← Ind + H 3O − + 31. Consider the following HInd equilibrium for→theInd indicator at its transition point: + H 3OHInd 2 O ←the When a small amount of base+isHadded, equilibrium shifts to the − + 31. Consider the following equilibrium for→theInd indicator HInd at its transition point: HInd +is−Hadded, + H 3O 2O ← When a small amount of base the equilibrium shifts to the > Ind A. left and the HInd [ ] − → equilibrium +−−Hadded, + H 3O + shifts to the When a small amount 2 O ←theInd B. left left and the the HIndof Indis [[ HInd ]]HInd ><base Ind A. and [ ] [ ] When a small amount of is ]added, C. right andthe the[[HInd > [ HInd B. and ]] <>]base Ind A. left left and the HInd [ Ind ] the equilibrium shifts to the [ Ind D. right andthe the[HInd HInd Ind ] C. and the [[HInd B. right left and and the HInd Ind ] ]><] ><[ Ind [ Ind A. left ] D. and the [[HInd C. right rightand andthe the[ HInd HInd Ind] ] [ Ind B. left ] ]<] <>[ Ind D. right right and and the the [HInd HInd ] >< [Ind Ind C. The approximate K value for the] indicator thymolphthalein is D. right and the [ HInd ] < [ Ind ] The K value for the indicator thymolphthalein is A. approximate 1 × 10 −− − − −− − − −− 29 32. 32. −− a − −10 a B. approximate 1 × 10 −4 32. A. The K a value for the indicator thymolphthalein is 1 × 10 −10 C. 4 −4 B. approximate 1 × 10 32. The K a value for the indicator thymolphthalein is A. 110× 10 −10 D. C. 4 −4 B. 1 × 10−10 D. A. 10 1 × 10 C. 4 B. 1 × 10 −4 D. 10 C. 4 D. 10 Acid Base Practice Test 31 HC 6. Nicotinic acid, weakHC acid found in vitamin B. 6.6 HNicotinic acid, 4 NO 2 , is a 6 H 4 NO 2 , is a weak acid found in vitamin B. −5 Calculate the pH of 0.010 M HCthe K a =M1. HC 4 × 610 . 2 K a = 1. 4 × 10 −5 . (4 marks) Calculate of2 0.010 H 4 NO 4 NO 6 HpH ( 32 ) ( ) What is the pH of a 0.150M solution of Na2SO4 (4 marks) (4 marks) 7. isAused solution of NaOHseparate is used solutions to neutralize separate solutions of HF and HBr. 7. A solution of NaOH to neutralize of HF and HBr. a) Write for thethe formula equation of forHF. the neutralization of HF. a) Write the formula equation neutralization (1 mark) (1 mark) (1 mark) (1 mark) b) Write the net ionic equation for the neutralization of HBr. b) Write the net ionic equation for the neutralization of HBr. c) One of the neutralization reactions above produces a salt that undergoes hydrolysis. c) One of the neutralization reactions above produces a salt that undergoes hydrolysis. Identify the ionic salt and write the equation for the hydrolysis reaction. (2 marks) Identify the salt and write the net equation for net the ionic hydrolysis reaction. (2 marks)
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