# A. Write skeleton equations

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A. Write skeleton equations
Hydrogen gas reacts with bromine gas to produce gaseous hydrogen monobromide Carbon Monoxide Gas reacts with oxygen gas to produce Carbon dioxide Solid potassium chlorate decomposes to produce solid potassium chloride and oxygen gas

B. Use the following equation to answer the questions
2NaOH + CaBr2  Ca(OH)2 + 2NaBr ? g 75g g Identify the reactants Identify the products How many moles of NaBr are produced How many grams of NaOH are used

C. Identify the meaning of the symbol
(aq) .

D. Balance the following
Fe + Cl2  FeCl3 Pb(NO3)2 + KI  PbI2 + KNO3 Ni + AuBr3  NiBr2 + Au C12H22O11 + O2  CO2 + H2O

E. Identify the type of reaction
Ti +2Cl2  TiCl4 AgNO3 + LiI  AgI + LiNO3 2C2H2 + 5O2  4CO2 + 2HOH Mg + Cr(NO3)3  Mg(NO3)2 + Cr A + B  AB + Heat

F. Predict the products HCl  NaOH + CuCl2  H2SO4 + NaCN  Al + I2 
Mg + Sn(NO3)4 

G. Turn the following into sentences
K(s) + ZnNO3(aq)  Zn KNO3 (aq) 3Li(s) + AuCl3 (aq)  3LiCl(aq) + Au(s) Al2(CO3)3(s)  Al2O3(s) + 3CO2

ANSWERS H2 (g) + Br (g)  HBr (g) CO (g) + O2 (g)  CO2 (g)
KClO3 (s) KCl (s) + O2 (g) 2NaOH + CaBr2 Ca(OH)2 ­+ 2NaBr 2 105g Aqueous (dissolved in water) Yields or produces Heat Reversible reaction 4,3,2 1,2,1,2 3,2,3,2 1,12,12,11 synthesis Double combustion single (synthesis) exothermic H + Cl2 NaCl + Cu(OH)2 HCN + Na2SO4 AlI3 Mg(NO3)2 + Sn

A. Ni(OH)2(s) + HCl(aq)  NiO(aq) + H2 (g) +HCl(aq)
Finely ground nickel (II) hydroxide is placed in a beaker of water. It sinks to the bottom of the beaker and remains unchanged. An aqueous solution of hydrochloric acid is then added to the beaker, and the Ni(OH) 2 disappears. Which of the following equations best describes what occurred in the beaker? A. Ni(OH)2(s) + HCl(aq)  NiO(aq) + H2 (g) +HCl(aq) B. Ni(OH)2(s) + 2H2O(l)  NiCl2 (aq) + 2H2O(l) C. Ni(OH)2(s) + 2H2O(l)  NiCl2 (aq) + 2H2O(l) D. Ni(OH)2(s) + 2H2O(l)  NiCl2(aq) + 3H2O(l) + O2(g) Answer = B Question from D2SC

Which set of coefficients would balance the following equation?
Mg + AlCl3  Al + MgCl2 2Mg + AlCl3  Al + 2MgCl2 3Mg + 2AlCl3  2Al + 3MgCl2 Mg + 2AlCl3  2Al + MgCl2 3Mg + 4AlCl3  4Al + 3MgCl2 Answer = B Question from D2SC