Start with 3 free Unit 13 practice problems. When you want more reps on concentration, dilution, solubility, and solution behavior, premium unlocks Quick Sets of 3, Standard Sets of 9, and Extended Sets of 18 from this 172-problem bank.
3 Free Sample Problems
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