Solutions Chemistry Practice Test Part 1 - Answer Key
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- Calculate the sodium ion concentration when 70.0 mL of 3.0M sodium carbonate is added to 30.0 mL of 1.0 M sodium bicarbonate.
4.5 M Na+
- A solution is prepared by dissolving 25.0 g of ammonium sulfate in enough water to make 100.0 mL of stock solution. A 10.00 mL sample of this stock solution is added to 50.00 mL of water. Calculate the concentration of ammonium ions and sulfate ions.
0.0315 M SO42-
0.0630 M NH4+
- A 230. mL sample of a 0.275 M CaCl2 solution is left on a hot plate overnight; the following morning, the solution is 1.10M. What volume of water evaporated from 0.275 M CaCl2 solution?
172.5 mL of water evaporated
- A solution is prepared by adding 20.0 mL of 0.10 M HCl to 40.0 mL of 0.25 M HNO3. Calculate the concentration of H+ in this solution.
0.20 M H+
- Determine if the following are non, weak or strong electrolytes.
- KI Strong electrolyte
- H2S Weak electrolyte
- HClO4 Strong electrolyte
- CH2O Non-electrolyte
- Tap water Weak electrolyte
- What is the concentration of potassium in a 2.5M sol’n of potassium phosphate?
7.5 M K+