BTEC International Level 2 Applied Science

Unit 19: Unit 19 — assessment criteria

BTEC International Level 2 Unit 19 (Unit 19) — 30 Guided Learning Hours.

Internal / Optional30 GLH16 criteria
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Assessment criteria

Reproduced verbatim from the Pearson specification — the same grid the assignment brief carries. A unit grade is the highest band where all criteria in that band (and every band below it) are met.

Pass

8 criteria
A.P1Carry out tests on solutions of household and laboratory substances to determine their pH.
B.P2Carry out practical tests to identify common gases.
B.P3State the formulae of ions present in named ionic compounds.
B.P4Devise and follow a plan to identify the cations in unknown substances correctly.
B.P5Devise and follow a plan to identify the anions in unknown substances correctly.
C.P6Prepare salts from soluble and insoluble reactants.
C.P7Carry out a titration of an acid and an alkali.
D.P8Carry out chromatographic separation using different techniques.

Merit

4 criteria
A.M1Compare the pH of a weak acid and a strong acid of identical concentration and draw a conclusion about the concentration of hydrogen ions.
B.M2Deduce the identity of unknown substances tested.
C.M3Use the mole concept to calculate the concentration of a solution in mol dm-3 and convert from g dm-3 to mol dm-3.
D.M4Calculate an Rf value for a chromatographic separation.

Distinction

4 criteria
A.D1Evaluate the procedures used and the sources of error in measuring pH of solutions.
B.D2Write balanced symbol equations for tests used to identify an unknown substance.
C.D3Determine the concentration of an unknown solution using data from a titration experiment.
D.D4Analyse the outcomes of a chromatographic separation.

Command verbs in this unit

The verb decides the depth expected — that is what separates Pass from Merit and Distinction work on the same learning aim.

CarryStateDevisePrepareCompareDeduceUseCalculateEvaluateWriteDetermineAnalyse
Pearson's ladder runs Identify → Describe → Explain → Compare / Analyse → Evaluate / Justify / Assess. A Merit or Distinction criterion on the same aim always implies the Pass beneath it: an “evaluate” answer that never first “explains” fails, however polished it reads. Hover a verb for what it demands.

How checkb.tech checks this unit

Upload a learner's submission and checkb.tech reads it against exactly these criteria, reporting each one as met, partly met, or not met — with the evidence that informed the verdict cited, so every call is auditable.

The check runs against the official Pearson documents for this unit, and identical evidence always produces an identical result — the same script gets the same verdict every time.

It never awards a grade. You stay the assessor: confirm, dismiss, or act on every criterion before your assessment decision is final.

Verification & Quality Tools for Unit 19

Free Lead IV and assessor utilities configured for Pearson BTEC International specifications.

More Level 2 Applied Science units

Criteria and aim text reproduced for teacher reference from the official Pearson qualification documentation (Pearson BTEC International Level 2 Qualifications). BTEC is a registered trademark of Pearson Education Limited. checkb.tech is an independent tool — not affiliated with, endorsed by, or sponsored by Pearson. It never awards a grade; the teacher stays the assessor.