5/19/2011
Name ‘Em!
Nomenclature with an Acid Series
• Name the following
– HCl
– HClO
– HClO2
– HClO3
– HClO4
PROBLEM:
The following reactions are important environmental processes. Identify the conjugate acid‐base pairs.
• HCl (aq
aq))
• H2SO3
• HNO3
• H2SO4
• H3PO3
• HCIO2
• HBrO3
• H3PO4
PROBLEM:
Identify the acid / base conjugate pairs
(a) H2PO4‐(aq) + CO32‐(aq) HPO42‐(aq) + HCO3‐(aq)
(a) H2PO4‐(aq) + NH3(aq) HPO42‐(aq) + NH4+(aq)
(b) H2O(l) + SO32‐(aq) OH‐(aq) + HSO3‐(aq)
(b) H2O(l) + HS
O(l) + HS‐(aq) OH
(aq)
OH‐(aq) + H
(aq) + H2S(aq)
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5/19/2011
Try These! – Find the pH
1) A 0.15 M solution of Hydrochloric acid
pH calculations – Solving for H+
• A solution has a pH of 8.5. What is the Molarity of hydrogen ions in the solution?
2) A 3.00 X 10‐7 M solution of Nitric acid
The pH of rainwater collected in a certain region of the northeastern United States on a particular day was 4.82. What is the H+ ion concentration of the rainwater?
Calculating [H3O+], pH, [OH‐], and pOH
Problem 1: A chemist dilutes concentrated hydrochloric acid to make two solutions: (a) 3.0 M and (b) 0.0024 M. Calculate the [H3O+], pH, [OH‐], and pOH of the two solutions at 25°C.
The OH‐ ion concentration of a blood sample is 2.5 x 10‐7 M. What is the pH of the blood?
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5/19/2011
Calculating [H3O+], pH, [OH‐], and pOH
Problem 2: What is the [H3O+], [OH‐], and pOH of a solution with pH = 3.67? Is this an acid, base, or neutral?
1. How many milliliters of 1.50 M HCl would be necessary to neutralize 125 mL OF 2.6 M NaOH?
Calculating [H3O+], pH, [OH‐], and pOH
Problem 3: Problem #2 with pH = 8.05?
2. How many milliliters of 4.494 M H2SO4 would be necessary to neutralize 7.2280 grams of LiOH?
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5/19/2011
35.62 mL of NaOH is neutralized with 25.2 mL of 0.0998 M HCl by titration to an equivalence point. What is the concentration of the NaOH? • Find the molarity of a hydrochlic acid solution if 42.0 mL of 0.15 M NaOH are required to neutralize 100.0 mL of the acid.
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