Skip to content

Course home

Sign up

Atoms and reactions

EasyMediumHard
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137
Question 39

In the laboratory, acid spills can be cleaned up and made safe by spreading anhydrous sodium carbonate over the spill to neutralise the acid. A student accidentally spills 75.0 cm3 of 1.60 mol dm−3 HNO3(aq)1.60\text{ mol dm}^{-3}\ \text{HNO}_3(\text{aq})1.60 mol dm−3 HNO3​(aq) on the bench.

What is the minimum mass of anhydrous sodium carbonate required to neutralise the acid?

A

4.98 g4.98\text{ g}4.98 g

B

6.36 g6.36\text{ g}6.36 g

C

12.7 g12.7\text{ g}12.7 g

D

25.4 g25.4\text{ g}25.4 g

Markscheme

Atoms and reactions Questions

  1. A Level
  2. /Chemistry
  3. /Atoms and reactions

199 exam-style questions on OCR A A Level Chemistry Atoms and reactions, covering Atomic structure and isotopes, Compounds, formulae and equations, Amount of substance, Acids, and Redox. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank