Vocabulary
A conversion factor that relates the amounts in moles of any two substances involved in a chemical reaction.
What is mole ratio?
The maximum amount of product you could make in a "perfect world" based on the limiting reactant
What is theoretical yield?
Balance the following equation:
__AlCl3 + __Ag2SO4 --> __AgCl + __Al2(SO4)3
What is:
2 AlCl3 + 3 Ag2SO4 --> 6 AgCl + __Al2(SO4)3
Mg + 2HCl --> MgCl2 + H2
What mass of hydrogen is produced from the reaction of 75 g HCl (MM=36.5 g/mol) and excess Mg?
What is 2.0 g H2?
N2 + 3H2 --> 2NH3
In the reaction above, a student reacted 28 g of nitrogen with an excess of hydrogen. According to the students measurements, the reaction produced 30 g of product. The theoretical yield was 34 g. What is the student's percent yield?
What is 88%?
The measured amount of product obtained after performing a chemical reaction (what you really get in the lab).
What is actual yield?
Balance the following
__CO2 + __H2O --> __C6H12O6 + __ 6O2
What is:
6CO2 +6H2O --> C6H12O6 + 6O2
How many moles are in 98.3 grams of aluminum hydroxide, Al(OH)3?
What is 1.26 moles of Al(OH)3?
Avogadro's number.
What is 6.022 x 1023?
The reactant that determines the amounts of the other reactants that can combine--and the amount of product that can form--in a chemical reaction.
What is the limiting reactant?
2Mg +O2 --> 2MgO
How many moles of magnesium oxide are produced from 1.2 moles of magnesium?
What is 1.2 mol MgO?
Mg + 2HCl --> MgCl2 + H2
What mass of hydrochloric acid (MM=37 g/mol) is needed to produce 236.12 g of magnesium chloride (MM = 96 g/mol)?
What is 182 g HCl?
2Na + Cl2 --> 2NaCl
Sodium and chlorine react to produce sodium chloride (table salt; 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 g NaCl?
How many moles are present in 34 grams of Cu(OH)2?
What is 0.35 mol Cu(OH)2?
The ratio of the actual yield to the theoretical yield, multiplied by 100.
What is percent yield?
How many grams are in 3.3 moles of potassium sulfide (K2S)?
What is 363 g K2S?
Mg + 2HCl --> MgCl2 + H2
How many grams of hydrogen will be produced if we start with 73 g of hydrochloric acid and excess magnesium?
What is 2 g H2?
2NaOH + H2SO4 --> 2H2O + Na2SO4
Sodium hydroxide reacts with sulfuric acid (H2SO4; MM=98.1 g/mol) to form water and sodium sulfate. How many grams of sodium sulfate (MM=124 g/mol) will be formed from 200 g NaOH (MM=40 g/mol) and an excess of sulfuric acid?
What is 355 g Na2SO4?
Given the equation:
2LiOH + H2SO4 --> Li2SO4 + 2H2O
If 30 g of LiOH yield 50 g of H2O and 30 g of H2SO4 yield 40 g of H2O the limiting reactant would be.... the excess reactant would be...
What is:
Limiting is H2SO4
Excess is LiOH
States that mass is neither created nor destroyed during ordinary chemical or physical reactions. (This is why we balance chemical equations!)
What is the law of conservation of mass?
The theoretical yeild of an experiment is 86.5g of product "X"? When you run the experiment you get a percent yeld of 82%. What is the actual yield of product "x"?
What is 70.93g of product "x"?
__Al2O3 + __Fe --> __Fe3O4 + __Al
Aluminum oxide (Al2O3) reacts with iron (Fe) to form Fe3O4 and Aluminum (Al). Determine with limiting reactant when 5 moles of aluminum oxide reacts with 7 moles of iron.
What is iron?
__CuCl2 + __NaNO3 --> __Cu(NO3)2 + __NaCl
When copper (II) chloride reacts with sodium nitrate, copper (II) nitrate and sodium chloride are formed. If 15 g CuCl2 (MM=134.5 g/mol) react with 20 g NaNO3 (MM=85 g/mol), how much sodium chloride (MM = 58.5 g/mol) can be formed?
__ CuCl2 + 2 NaNO3 --> __Cu(NO3)2 + 2 NaCl
What is 13.0 g NaCl?
This questions is worth 1000 points! SURPRISE!
Chlorine gas reacts with potassium bromide to produce potassium chloride and bromine gas. Write the balanced equation then determine: How many grams of potassium chloride can be produced from 300. g EACH of chlorine and potassium bromide?
Cl2 + 2 KBr --> 2 KCl + Br2
What is 188 g KCl?