Carry out procedures to identify ions present in solution
NZQA suppresses grade rates for low-cohort standards.
In this standard, you'll do practical lab work to identify which ions are dissolved in a solution by following a specific testing procedure. You'll collect data from chemical reactions (like colour changes or precipitates forming), record your observations carefully, and use them to figure out which ions are present. The key is linking what you actually see happen to what ions must be in the solution.
You successfully carry out the lab procedure, make observations, and correctly identify which ions are present based on what you actually saw happen.
You justify your ion identifications by writing balanced equations for the precipitation reactions you observed and linking them to your data.
You comprehensively justify your identifications by recognising and explaining complex ion formation (ions that reform when you add excess reagent), writing balanced equations for these reactions, and showing you understand what's happening beyond just the precipitate forming.
Standards typically taken alongside or after this one. Same subject, grouped by level.