Vocab
The ratio of the actual yield to the theoretical yield, multiplied by 100.
What is percent yield?
CO2 + 2 LiOH --> Li2CO3 + H2O How many moles of Lithium hydroxide are required to react with 20 moles of CO2?
What is 40 mole LiOH?
The mole ratio of oxygen and magnesium oxide in the equation:
2 Mg + O2 --> 2 MgO
What is 1:2?
Mg + 2HCl --> MgCl2 + H2 --> What mass of Hydrogen is produced from the reaction of 75 g HCl (Molar Mass= 36.5 g/mol) and excess Mg?
What is 2.0 g H2?
N2 + 3H2 --> 2NH3 In the reaction, a student reacted 28 g of N2 with an excess of H2. 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%
A conversion factor that related the amount in moles of any two substances involved in a chemical reaction.
What is mole ratio?
6CO2 + 6 H2O --> C6H12O6 + 6O2 How many moles of carbon dioxide are needed to react with 3.25 mol of water in this reaction?
What is 3.25 moles CO2?
How many moles of aluminum atoms are needed to combine with 1.58 mol of oxygen molecules to make aluminum oxide? ( 4 Al + 3 O2 --> 2 Al2O3)
What is 2.1 mol Al?
2KClO3 --> 2KCl + 3O2 How many grams of KCl are produced if 5.0 g of KClO3 is decomposed?
What is 3.0 g KCl?
Avogadro's number
What 6.02 x 1023 atoms/particles/molecules
AB + CD --> AD + CB What is the type of reaction?
What is Double Replacement?
2Mg + O2--> 2MgO How many moles of Magnesium oxide are produced from 1.2 moles of Magnesium?
What is 1.2 mol MgO?
__ P + __ Br2 --> __PBr3
If 35.0 grams of Bromine are reacted and 27.9 grams of PBr3 are formed, what is the percent yield?
What is 70.6 %
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 62.9 g NaCl?
How many moles are present in 34 grams of Cu(OH)2?
What is 0.35 mol Cu(OH)2
In a chemical reaction, the reactant that is not the limiting reactant is called
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?
Mg + 2HCl --> MgCl2 + H2 How many grams of Hydrogen will be produced if we start with 2 moles of Hydrochloric acid and excess Magnesium?
What is 2g of Hydrogen?
How many grams of sodium sulfate (MM= 124 g/mol) will be formed if you start with 200.0 grams of sodium hydroxide (MM= 40 g/mol) and you have an excess of sulfuric acid?
2 NaOH + H2SO4 --> 2 H2O + Na2SO4
What is 310 g Na2SO4?
Balance this reaction: __LiOH (s) + __H2SO4 (aq) --> __ Li2SO4 (aq) + __ H2O (l)
What is 2 LiOH (s) + H2SO4 (aq) --> Li2SO4 (aq) + 2 H2O (l)
States that mass is neither created nor destroyed during chemical reactions. (The reason we balance equations!)
H2 + O2 --> H2O (Make sure to balance!) How many moles of Oxygen would be required to produce 5.0 moles of water?
What is 2.5 mol of O2?
Al2O3 reacts with Fe to form Fe3O4 and Al. Determine what the limiting reactant is when 5 moles of aluminum oxide reacts with 7 moles of iron.
What is iron?
CuCl2 + 2 NaNO3 --> Cu(NO3)2 + 2 NaCl. 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?
What is 13.0 g NaCl?
Cl2 + KBr --> KCl + Br2 . (Make sure to balance!) How many grams of potassium chloride can be produced from 300. g each of chlorine and potassium bromide?
What is 188 g KCl?