Unit 6 Practice - Flipped
Moles Guided Practice
1. How many moles of magnesium sulfate are in 5.00g of magnesium sulfate?
2. How many moles of sodium chloride are in a sample of sodium chloride that contains 2.50x1023 formula units
of sodium chloride?
3. How many molecules of carbon dioxide are in a 5.15g chunk of solid carbon dioxide?
4. What is the mass of 4.00x1022 formula units of iron(III) oxide?
Moles Independent Practice
1. How many moles of aluminum are in 5.34g of Al?
2. How many grams of silicon are in 1.452 mol Si?
3. How many atoms are in 9.381 mol of Zinc?
4. How many moles of sodium chloride are in 6.21g of sodium chloride?
5. How many molecules of methane are in 0.850 mol methane?
6. How many molecules of phosphorus trichloride are in 53.4g?
7. What is the mass (in grams) of 4.56x1021 formula units of sodium carbonate?
8. How many formula units of calcium chloride are in 0.521g of calcium chloride?
9. What is the mass in grams of 8.43x1024 molecules of methane?
10. What is the mass in grams of 9.43x1023 formula units of magnesium nitride?
Molarity Guided Practice
1. How many moles of iron(II) sulfate are in 125mL of a solution where [FeSO4] = 0.0530M?
2. 15.5g of barium chloride is dissolved in enough water to make 150mL of solution. What is the [BaCl2] in the
solution?
3. What volume in L of a 0.100M ammonia solution contains 4.95x1023 ammonia molecules?
4. What volume of a 0.150M solution of aluminum nitrate is required to obtain 5.00g of aluminum nitrate?
Molarity Independent Practice
1. How many liters of a 0.51M NaCl solution are necessary to have 1.38 mol of NaCl?
2. How many moles of H2SO4 are in 4.8mL of a solution where [H2SO4] = 18.1M?
3. A typical solution made for swishing with salt water would be made with about 10.0g of sodium chloride in
about 240mL of water. What is the [NaCl] in this solution?
4. 7.91 g of sodium carbonate is dissolved in enough water to make 200.0mL of solution. What is the [Na2CO3]
of the solution?
5. How many mL of a 1.29M H2SO4 solution are required to have 0.0251mol H2SO4?
6. How many mol of Epsom salt (MgSO4) are in 124mL of 0.250M Epsom salt?
7. What mass of sodium chloride is required to create 265mL of a 0.210 M salt solution?
8. How many molecules of HCl are dissolved in 3.00mL of 12.0M HCl?
9. In one cup of skim milk (236.6mL), there is typically 0.306g of Ca2+ ions. What is the [Ca2+] in milk?
Solubility Independent Practice
Are the following soluble or insoluble in water?
1. Sodium iodide
2. Iron(III) carbonate
3. Silver sulfate
4. Calcium sulfide
5. Potassium phosphate
Dilution Guided Practice
1. What is the concentration of a solution prepared by mixing 10.0mL of 18.0M H2SO4 in enough water to make
0.5000L of solution?
2. A solution of iron(III) nitrate is prepared by taking 5.0mL of a stock solution of unknown concentration and
diluting it to 2.00L. This solution is later found to have a concentration of 0.0112M. What is the concentration of
the unknown stock solution?
Dilution Independent Practice
1. What is the molarity of a solution created by diluting 12.0mL of 18.0M H2SO4 to 500.0mL of solution?
2. What volume of 6.0M NaOH is required to make 200.0mL of 0.500M NaOH?
3. 35.0mL of a solution of unknown concentration is diluted to 500.0mL. Later testing shows the diluted solution
is 0.121M MgSO4. What was the original [MgSO4]?
4. You are nearly out of concentrated hydrochloric acid (12.0M HCl) and have only 24.5mL left. How much
0.100M HCl can you make?
5. What volume of 15.0M H3PO4 is required to make 2.0L of 0.200M H3PO4?
6. 15.2mL of 2.19M calcium chloride is diluted to 325mL. What is the [CaCl2] of the diluted solution?
Counting Atoms Guided Practice
1. How many sulfur ions are found in 3.55g of iron(III) sulfide?
2. What volume (in mL) of 0.34M sucrose solution (C12H22O11) contains 1.50x1023 carbon atoms?
Counting Atoms Independent Practice
1. How many aluminum atoms are in 1.50x1022 formula units of aluminum oxide?
2. How many hydrogen atoms are in 4.50g of methane?
3. What volume in mL of 6.00M HCl contains 5.0x1022 chlorine atoms?
4. How many carbon atoms are in 50.0mL of a 0.200M sucrose (C12H22O11) solution?
5. What mass of carbon dioxide is necessary to obtain 2.00x1024 oxygen atoms?
Mixed Unit 6 Independent Practice
1. How many mL of 0.525M calcium chloride are needed to obtain 5.00x1022 chloride ions?
2. What is the molarity of a solution prepared by dissolving 36.05g of sodium hydroxide in 3.00L of water?
3. What is the mass of ammonia dissolved in 100.0mL of a 14.8M ammonia solution?
4. What mass of aspirin (C9H8O4) contains 1.00x1023 atoms of oxygen?
5. What is the [HCl] of a solution prepared by dissolving 15.0mL of 12.0M hydrochloric acid in enough water to
make 0.50L of solution?