Silver nitrate and potassium chromate react in aqueous solution to form a precipitate of silver chromate according to the following equation:
2AgNO3(aq)+K2CrO4(aq)→Ag2CrO4(s)+2KNO3(aq) 2\text{AgNO}_3(\text{aq}) + \text{K}_2\text{CrO}_4(\text{aq}) \rightarrow \text{Ag}_2\text{CrO}_4(\text{s}) + 2\text{KNO}_3(\text{aq}) 2AgNO3(aq)+K2CrO4(aq)→Ag2CrO4(s)+2KNO3(aq)In an experiment, 50.0 cm3 of a 0.150 mol dm-3 solution of AgNO3\text{AgNO}_3AgNO3 is mixed with 30.0 cm3 of a 0.200 mol dm-3 solution of K2CrO4\text{K}_2\text{CrO}_4K2CrO4.
Which amount, in mol, of silver chromate is formed?
1.50×10−21.50 \times 10^{-2}1.50×10−2
3.75×10−33.75 \times 10^{-3}3.75×10−3
6.00×10−36.00 \times 10^{-3}6.00×10−3
7.50×10−37.50 \times 10^{-3}7.50×10−3
79 exam-style questions on AQA A Level Chemistry Amount of substance, covering Relative atomic mass and relative molecular mass, The mole and the Avogadro constant, The ideal gas equation, Empirical and molecular formula, and Balanced equations and associated calculations. Each one has a worked solution and a mark scheme showing where the marks go.