A Level Chemistry 9701/13/O/N/19 Q15
Solutions P and Q each contain a different Group 2 ion at the same concentration. One contains Mg2+, the other contains Ba2+. Tests are carried out on separate 5 cm3 samples of P and Q.
test 1: add 1cm3 of 0.1 mol dm–3 Na2SO4(aq)
test 2: add 1cm3 of 0.1 mol dm–3 NaOH(aq)
What are the results of these tests?