All topicsWhich procedures will result in a 1.000 m solution of sodium acetate? I. Adding 1.000 mol sodium acetate trihy2025 national · question 617%A student wishes to prepare a solution with a final concentration of Na⁺ = 0.50 M and a final concentration of2020 national · question 519%After mixing 30.0 mL of 0.30 M Ca(NO₃)₂ solution and 15.0 mL of 0.60 M NaF solution, which ions are present in2018 national · question 525%
Stoichiometry and solutions
This is block 1 of 10, questions 1–6 on both the local section exam and national Part I. Across the 39 national questions where ACS published item statistics, qualifiers answered 64% correctly, which makes it the most approachable of the 10.
What it covers
mole conceptlimiting reagentpercent compositionempirical formulasolution stoichiometrygas stoichiometrymolarity and dilutioncolligative properties
Where qualifiers lose points
% who got it rightThese are the stoichiometry and solutions questions the fewest national qualifiers answered correctly. If you can do these, the block is not your problem.
Every question is from a published past exam and carries its source. Practice adapts to what you miss, and anything you get wrong comes back on a spaced schedule. No account needed. See the other nine blocks.