Label it
Foundation
Give C1, V1, C2 and V2 the correct job, read final-volume wording and sense-check what dilution changes.
Use supplied fictional practice dilution relationships to label C1, V1, C2 and V2, read final-volume wording literally and solve the missing value. These numbers are calculation data only, not product-specific preparation instructions. A simple C1V1 = C2V2 dilution tracks the same medicine/solute amount while added diluent contributes no additional tracked medicine; mixing two solutions that both contain the tracked medicine is a different problem. Verify compatible concentration bases — a bare % is not enough, and % w/w is not treated as a generic volume concentration. In real care, verify whether dilution is required, the diluent, target concentration, compatibility, preparation method, measurable precision and administration instructions from authorised product and local guidance.
Label it
Give C1, V1, C2 and V2 the correct job, read final-volume wording and sense-check what dilution changes.
Solve it
Complete straightforward dilution calculations for C2, V2 and V1 from clearly supplied practice values.
Rearrange it
Solve any missing C1, V1, C2 or V2 while separating the four dilution values from nearby chart detail.
Reason through it
Work through realistic ward-style dilution stories, changed plans, missing information, error checks and linked dose-volume calculations.