Making insoluble salts
2 marks · EasyWrite a balanced ionic equation, including state symbols, for the formation of calcium carbonate as a precipitate from aqueous solutions.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
\ce{Ca^{2+}(aq) + CO3^{2-}(aq) -> CaCO3(s)}
Common mistakes: Omitting state symbols; Writing a full equation instead of ionic
Show mark scheme and worked solution
Marking points
M1 · 1 mark · For writing correct ions on the left and precipitate on the right.
A1 · 1 mark · For including correct state symbols (aq for ions, s for solid).
Worked solution