NOTE: These exemplars do not fully show Grade Score Marking (GSM) because of the small sample of student scripts involved, and the absence of a cut score meeting to determine grade boundaries. In 2012, level 1 2011 examination papers will have exemplars marked fully in accordance with GSM. These will be published on the NZQA website when the assessment schedules are published.

EXEMPLAR FOR MERIT

Candidate has demonstrated good understanding of the frequency of particle collisions and activation energy but they have not linked to the formation of precipitate. Therefore, the overall grade for Question One is M6.

The answers are correct and to 3 s.f, which is necessary for an Excellence grade.

This is well answered, with equation. Therefore the candidate earns an overall grade of E8 for Question Two.

NOTE: These exemplars do not fully show Grade Score Marking (GSM) because of the small sample of student scripts involved, and the absence of a cut score meeting to determine grade boundaries. In 2012, level 1 2011 examination papers will have exemplars marked fully in accordance with GSM. These will be published on the NZQA website when the assessment schedules are published.

EXEMPLAR FOR MERIT

There is no link between particle collisions and the reaction itself. Ie, cross disappears. This limits the grade to M6 for Question One.

There are equations missing. The candidate has also not mentioned [H3O+] or [OH–] in the NaOH solution. This limits the overall grade for Question Two to M6.

(a) (i) and (ii) are answered correctly.

The answer is not fully explained here, but with the correct calculation of 19.6, the candidate earns an overall grade of E7 for Question Three.