Try 3 free problems on concentration, dilution, solubility, and solution behavior. Want more reps? Premium opens the full 172-problem bank in sets of 3, 9, or 18.
Work these 3 to find out whether the concentration ideas are solid enough to turn into calculations — or whether the setup still needs more practice before it becomes reliable.
#4Dilution
How many mL of 12.0 M HCl must be diluted to make 250.0 mL of 0.500 M HCl? (C1V1 = C2V2)
#5Colligative Properties
Which solution would have the LOWEST freezing point?
#6Freezing Point Depression
What is the freezing point of a 1.00 m NaCl solution? (Kf = 1.86 °C·kg/mol; NaCl dissociates into 2 particles, i = 2)
Prep for the test — not just the homework
The 3 free problems show you where you stand. The full bank is how you close the gaps before the test.
Randomized every time — fresh problems that force real understanding, not answer memorization
Full worked solutions — see exactly where your setup went off track, not just whether you were right
172 problems across molarity, dilution, solubility, and colligative properties
Quick (3), Standard (9), or Extended (18) — use whatever fits your schedule
Filter by type — focus on calculation, concept, or multi-step problems first
Filter by difficulty — dial in easy, medium, or hard problems as you build up
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High School Chemistry · Unit 13 · Solutions Practice