UNIT 4 Review
Shakeri
1) Using the following equation:
2 NaOH + H2SO4 à 2 H2O + Na2SO4
How many grams of sodium sulfate will be formed if you start with 200 grams of sodium hydroxide and you have an excess of sulfuric acid?
2) a) Write the equation for the reaction of iron (III) phosphate with sodium sulfate to make iron (III) sulfate and sodium phosphate.
b) If I perform this reaction with 25 grams of iron (III) phosphate and an excess of sodium sulfate, how many grams of iron (III) sulfate can I make?
C)If 18.5 grams of iron (III) sulfate are actually made when I do this reaction, what is my percent yield?
3) For the following reactions, find the following:
a) Which of the reagents is the limiting reagent?
b) What is the maximum amount of each product that can be formed?
c) How much of the other reagent is left over after the reaction is complete?
Consider the following reaction:
3 NH4NO3 + Na3PO4 à (NH4)3PO4 + 3 NaNO3
Answer the questions above, assuming we started with 30 grams of ammonium nitrate and 50 grams of sodium phosphate.
4) An unknown compound is found in tree sap. It has been shown to be composed of 40.0% carbon, 6.7% hydrogen and 53.3% oxygen by mass. It was also discovered that the molar mass is 180.02 grams per mole. What is the molecular formula of this compound?
5) Identify the most likely reaction type, predict the products and balance the reaction.
1. ____Al + ____O2 ®
2. ____BaSO4 + ____MgCl2 ®
3. ____ Zn + ____H2SO4 ®
4. ____CrCl3 ®
5. ____Fe2O3 ®
6. ____Ba + ____S ®
7. ____KCl + ____Mg(NO3)2 ®
8. ____CH4 + ____O2 à
6) How many moles are in 25 grams of water?
7) How many grams are in 4.5 moles of Li2O?
8) How many molecules are in 23 moles of oxygen?
9) How many moles are in 3.4 x 1023 molecules of H2SO4?
10) How many molecules are in 25 grams of NH3?
11) How many grams are in 8.2 x 1022 molecules of N2I6?