Product Prediction and Precipitation
The measured amount of product obtained after performing a chemical reaction.
What is the actual yield?
A conversion factor that relates the amounts in moles of any two substances involved in a chemical reaction.
What is a mole ratio?
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?
The ratio of the actual yield to the theoretical yield, multiplied by 100.
What is percent yield?
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 H2?
Write the complete balanced equation for the following reaction (include states): When lithium hydroxide pellets are added to a 12 M solution of sulfuric acid (H2SO4), lithium sulfate and water are formed.
What is: 2LiOH (s) + H2SO4 (aq) --> Li2SO4 (aq) + 2H2O (l)
CO2 + 2LiOH ---> Li2CO3 + H2O. How many moles of lithium hydroxide are required to react with 20 mmol of CO2?
What is 40 mmol of LiOH?
2KClO3 ---> 2KCl + 3O2 If 5g of KClO3 is decomposed, what volume of O2 is produced at STP?
What is 1.37 L?
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?
2KClO3 --> 2KCl + 3O2 How many grams of KCl are produced if 5.0 g of KClO3 is decomposed?
What is 3.0 g KCl?
Write the balanced chemical equation for potassium iodide and lead (II) nitrate (including states of matter)
What is: 2 KI (aq) + Pb(NO3)2 (aq) → 2 KNO3 (aq) + PbI2 (s)
6CO2 +6H2O --> C6H12O6 + 6O2 How many moles of carbon dioxide are needed to react with 3.25 mol of water in the reaction described above?
What is 3.25 mol of CO2?
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%?
Ammonia decomposes to produce nitrogen and hydrogen gases. How many moles of H2 can be formed by the decomposition of 0.145 moles of ammonia?
What is 0.218 mol H2?
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 of NaCl?
Write the balanced chemical reaction for the burning of isopropanol (C3H7OH).
2 C3H7OH (l) + 9 O2 (g) → 6 CO2 (g) + 8 H2O (g)
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 of NH3?
This questions is worth 1000 points! SURPRISE! Chlorine gas reacts with potassium bromide to produce potassium chloride and bromine gas. How many grams of potassium chloride can be produced from 300. g each of chlorine and potassium bromide?
What is 188 g of KCl?
C3H8 + 5O2 --> 3CO2 +4H20 If 20 L of oxygen are consumed in the above reaction, how many liters of carbon dioxide are produced?
What is 12 L CO2?
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?
A 15.67 g sample of a hydrate of magnesium carbonate was heated, without decomposing the carbonate, to drive off the water. The mass was reduced to 7.58 g. What is the formula of the hydrate?
MgCO3 · 5H2O
Hydrogen and oxygen gases react under a specific set of conditions to produce water. How many moles of oxygen would be required to produce 5.0 moles of water?
What is 2.5 mol of O2?
Aluminum oxide reacts with iron to form Fe3O4 and Aluminum. Determine with limiting reactant when 5 moles of aluminum oxide reacts with 7 moles of iron.
What is Fe?
2AlCl ---> 2Al + 3Cl2 If 10g of aluminum chloride are decomposed, how many molecules of Cl2 are produced?
What is 6.7 x 1023 molecules of Cl2?
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?
What is 13. g NaCl?