Stoichiometry review – H.Chem 2017
Please be sure you know everything listed here as well as any other topics previously covered this year!! You will need to have your periodic table, cation/anion sheet, and solubility rules. Show all work on a separate sheet of paper, please!
Know how to do the following:
- Write formulas for all types of compounds
- Mass to moles & mass to moles (molar mass)
- Volume of 1 mole of gas at STP
- significant figures
- Predict products of chemical reactions
- Balance chemical reactions
- Use mole ratios (which come from balanced reactions)
- Given a starting amount of a reactant, predict the theoretical yield of a product (in moles, mass, volume, an particles)
- Calculate the percent yield of a product
- Determine solubility of products in a reaction
- Identify the precipitate in a chemical reaction
- If I burn methane gas (CH4) and produce 5.89 moles of carbon dioxide at STP, how many moles of methane did I burn? How many grams of methane gas did I burn?
- In the following reaction: Al2O3 Al + O2, how many moles of Al would be produced from 20 moles of Al2O3?
- How many grams of O2 are required to produce 346 grams of ZnO in the following reaction: 2 Zn + O2 2 ZnO
- Which is the correct mole ratio of Mg(NO3)2 + K3PO4 Mg3(PO4)2 + KNO3?
- If 4.6 grams of hydrogen peroxide decomposes into water and oxygen gas, how many molecules of oxygen gas can I produce?
- If I could react 5.3 x 1045 atoms of copper with plenty of oxygen, how many grams of copper (II) oxide could I produce?
- If I react calcium acetate with potassium carbonate, what will be the precipitate?
- Determine the molar mass for the following, then determine if they are soluble:
- Magnesium nitrate
- Copper (II) chloride
- Silver sulfate
- Calcium hydroxide
- Magnesium carbonate
- Lead (II) sulfate
- Will the following reactions work? Predict the products of each, then indicate if the reaction works or not. If not, SAY WHY NOT. Then, BALANCE the reaction.
a) Cu + AgNO3
b) Zn + H2O
c) Mg + HCl
d) Na + H2O
e) Ca(ClO3)2 + CuSO4
f) AgNO3 + Pb(C2H3O2)2
g) BaBr2 + Ag2SO4
- Determine what type of reaction the following are, then write out the reaction and balance it. You can assume that all the following reactions “work.”
- potassium chloride + silver Nitrate potassium nitrate + silver chloride type: ______
- Iron + copper (II) sulfate iron (II) sulfate + copper type: ______
- Zinc + oxygen gas Zinc oxide type: ______
- Hydrogen peroxide water and oxygen gas type: ______
- zinc + sulfurous acid Zinc sulfite + Hydrogen gastype: ______
- potassium bromide Potassium and bromine gas type:______
- chlorine gas + sodium metal sodium chloride type: ______
- sodium bicarbonate sodium oxide + carbon dioxide + water type: _____
- zinc metal + copper (II) nitrate zinc nitrate + copper type:______
- Carbonic acid + calcium hydroxide water + calcium carbonate type: ______
- Balance the following reaction: Magnesium + oxygen magnesium oxide. Analyze the picture below. Accurately draw out the resulting products, and be sure to include any excess/left over reactant that did not react fully.
- Balance the following reaction: CH4 + O2 CO2 + H2O. Analyze the picture below. Accurately draw out the resulting products, and be sure to include any excess/left over reactant that did not react fully.
Key: = CH4 = O2