Name: ___________________________
Period: ______
Date: ______________
WS 7.3: Equation Translations
Directions: Write a balanced chemical equation for the following sentences. Some formulas have been provided to you because they
are common names. Other formulas you should know because of what you learned about naming in UNIT 6.
1) Nitrogen monoxide reacts with ozone (O3) to produce nitrogen dioxide and oxygen gas (O2).
NO + O3  NO2 + O2
2) Iron metals burns in oxygen gas to form Iron(III) oxide.
4 Fe + 3 O2  2 Fe2O3
3) Sodium metal reacts with chlorine gas (Cl2) to form sodium chloride.
2 Na + Cl2  2 NaCl
4) Acetylene, C2H2, burns in air to form carbon dioxide and water.
2 C2H2 + 5 O2  4 CO2 + 2 H2O
5) Liquid Hydrogen peroxide (H2O2) easily decomposes into liquid water and oxygen gas.
2 H2O2  2 H2O + O2
6) Dinitrogen tetrahydride and liquid hydrogen peroxide are used together as rocket fuel. The products are nitrogen gas and
water.
N2H4 + 2 H2O2  N2 + 4 H2O
7) If potassium chlorate is strongly heated, it decomposes to yield oxygen gas and potassium chloride.
KClO3  KCl + O2
8) When sodium hydroxide is added to liquid sulfuric acid (H2SO4), the products are water and aqueous sodium sulfate.
2 NaOH + H2SO4  2 H2O + Na2SO4
9) Calcium Carbonate decomposes to produce calcium oxide and carbon dioxide.
CaCO3  CaO + CO2
10) Solid titanium (IV) chloride reacts with water. Forming Titanium (IV) oxide and aqueous hydrochloric acid (HCl)
TiCl4 + 2 H2O  TiO2 + 4 HCl
Directions: Write out a complete sentence for the following chemical equations. You don’t have to bother with the physical states
for this part.
11) S2Cl2(l) + Cl2(g)  2 SCl2(g) (Cl2 is chlorine gas)
Disulfur dichloride reacts with chlorine gas to produce sulfur dichloride.
12) I2Cl6  ICl2 + ICl4
Diiodine hexachloride breaks down to produce iodine dichloride and iodine tetrachloride.
13) 2 F2 + 2 NaOH  OF2 + 2 NaF + H2O (F2 is fluorine gas)
Fluorine gas reacts with sodium hydroxide to produce oxygen diflouride, sodium fluoride, and water.
14) P4O6 + 6 H2O  4 H3PO3 (H3PO4 is phosphoric acid)
Tetraphosphorus hexaoxide reacts with water to produce phosphoric acid.
15) Na2Cr2O7 + S  Na2SO4 + Cr2O3
Sodium dichromoate reacts with sulfur to produce sodium oxide and Chromium (III) Oxide.
16) 2 Ca + O2  2 CaO
Calcium reacts with oxygen gas to produce calcium oxide
17) Cr2O3 + 3 CrO3  5 CrO2 + O2
Chromium (III) oxide reacts with Chromium (VI) oxide to produce Chromium (IV) oxide and oxygen gas.
18) CaCO3  CO2 + CaO
Calcium carbonate breaks down to form carbon dioxide and calcium oxide.
19) NCl3  N2 + Cl2 (N2 is nitrogen gas)
Nitrogen trichloride breaks down into nitrogen gas and chlorine gas
20) 2 SF6  S2F10 + F2
Sulfur hexafluoride breaks down into disulfur decaflouride and fluorine gas.