Vocabulary
Avogadro's number.
What is 6.02 x 1023?
CO2 + 2LiOH --> Li2CO3 + H2O
How many moles of lithium hydroxide are required to react with 15 moles of CO2?
What is 30 mol LiOH?
2H2+O2 -> 2H2O
Given EQUAL moles of H2 and O2, which reactant would be the limiting reactant?
H2
Ex. Given 1 mol H2 and 1 mol O2, 0.5 mols O2 would be required for 1 mol H2 to react.
Mg + 2HCl --> MgCl2 + H2
What mass of molecular hydrogen is produced from the reaction of 73 g HCl (MM=36.5 g/mol) and excess Mg?
What is 2.0 g H2?
Zn+2HCl→ ZnCl2 +H2
How many grams of hydrogen gas will be produced if we start with 2 moles of hydrochloric acid and excess zinc?
What is 2 g H2?
A conversion factor that relates the amounts in moles of any two substances involved in a chemical reaction.
What is mole ratio?
C6H12O6 + 6O2 -> 6CO2 +6H2O
How many moles of glucose are needed to react with 3 mol of oxygen gas in the reaction described above?
What is 0.5 mol C6H12O6?
N2 + H2 -> NH3
2 moles of nitrogen gas and 3 moles of hydrogen gas react to produce ammonia. Which reactant is in excess?
What is nitrogen gas?
BALANCED: N2 + 3H2 -> 2NH3
N2 is in excess because 1 mole is required to react with 2 moles of H2, but there are 2 moles available.
2KClO3 --> 2KCl + 3O2
How many grams of KCl are produced if 5.0 g of KClO3 is decomposed?
What is 3.0 g KCl?
Zn + 2HCl --> ZnCl2 + H2
What mass of hydrochloric acid (MM=36.5 g/mol) is needed to react with 2.50 moles of zinc?
What is 182 g HCl?
The reactant that determines the amount of product that can form in a chemical reaction.
What is limiting reactant (or limiting reagent)?
Magnesium and molecular oxygen react to produce magnesium oxide.
How many moles of magnesium oxide are produced from 1.2 moles of magnesium?
What is 1.2 mol MgO?
2Mg +O2 -> 2MgO
If 25.0 g of magnesium react with 50.0 g of chlorine, how much magnesium chloride will be produced?
What is 67.1 g MgCl2?
Cl is the limiting reactant.
Mole Ratio (Mg:Cl2) = 1.03:0.705
Sodium and chlorine react to produce sodium chloride (MM=58.5 g/mol). Determine the amount of product that can be produced from 24.7 g of sodium and excess chlorine.
What is 62.8 g NaCl?
Na + Cl -> NaCl
How many moles of aluminum atoms are needed to combine with 54 g of oxygen molecules to make aluminum oxide?
What is 4.5 mol Al?
4Al + 3O2 -> 2Al2O3
What is it called when equal moles of unknown acid are consumed by known base in titrations?
What is equivalence point?
(Not endpoint!)
Ammonia, NH3, is widely used as a fertilizer and in many household cleaners. How many moles of ammonia are produced when 6 mol of hydrogen gas react with an excess of nitrogen gas?
What is 4 mol NH3?
3H2 + N2 -> 2NH3
If 15.5 g of aluminum reacts with 46.7 g of chlorine gas to make aluminum chloride, which reactant is the limiting reagent?
What is Cl2?
2Al + 3Cl2 -> 2AlCl3
ACTUAL: 0.574 mol Al and 0.659 mol Cl2 in ratio 2:3.
REQUIRED: 0.861 mol Cl2.
Cl is the limiting reactant.
DAILY DOUBLE:
Sodium hydroxide reacts with sulfuric acid to form water and sodium sulfate. How many grams of sodium sulfate (MM=142 g/mol) will be formed from 100 g NaOH (MM=40.0 g/mol) and an excess of sulfuric acid?
"The Daily Double is a randomly chosen clue on the board that has no assigned value. Instead, the player can wager any part of their score before the clue is read. If they are right, they add the wager to their score. If not, they lose that amount."
What is 355 g Na2SO4?
NaOH + H2SO4 -> H2O + NaSO4
Ammonia decomposes to produce nitrogen and hydrogen gases. How many g of H2 can be formed by the decomposition of 0.145 moles of ammonia?
What is 0.435 mol H2?
2NH3 -> 3H2 + N2
MM H2 = 2.0 g/mol
The name of the indicator that turns the solution PINK in titrations.
What is phenolphthalein?
Hydrogen and oxygen gases react under a specific set of conditions to produce water. How many moles of oxygen gas would be required to produce 5.0 moles of water?
What is 2.5 mol O2?
2H2 + O2 -> 2H2O
How many grams of solid aluminum oxide are produced if 270. g of aluminum are combined with 256 g of oxygen gas?
What is 510 g aluminum oxide?
4Al + 3O2 -> 2 Al2O3
Al is the limiting reactant.
5.00 mol aluminum oxide is produced.
510. g aluminum oxide
When copper (II) chloride reacts with sodium nitrate, copper (II) nitrate and sodium chloride are formed. If 15 g CuCl2 (MM=134.4 g/mol) react with 20 g NaNO3 (MM=85 g/mol), how much sodium chloride (MM = 58.4 g/mol) can be formed?
What is 13.0 g NaCl?
CuCl2 + 2NaNO3 -> 2NaCl + Cu(NO3)2
CuCl2 is the limiting reactant.
93.0 g acetic acid (CH3COOH) and 70.0 g sodium hydroxide react to produce sodium acetate (CH3COONa) and water. How many grams of sodium acetate is produced?
What is 127 g sodium acetate?
CH3COOH + NaOH → CH3COONa + H2O
Sodium hydroxide is in excess.