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Are salts aqueous or solid???

6)A group of students investigated the effect of concentration on the rate of a reaction. They used the reaction between magnesium carbonate and dilute hydrochloric acid and measured the rate at which the gas was collected.
(a) (i) An incomplete equation for this reaction is given below. Complete the equation by balancing it and inserting state symbols.
MgCO3(.....) + HCl(.....)MgCl2(.....) + CO2(.....) + H2O(.....)

Answer:MgCO3(s) + 2HCl(aq) → MgCl2(aq) + CO2(g) + H2O(l)

why is mgc03 a salt but solid and mgcl2 is a salt but aq?
The magnesium carbonate is dissolving in the solution. You can imagine dropping a solid lump of the stuff into the solution, so it's solid at the beginning, and then the reaction happens in the solution and the products include aqueous magnesium chloride.

Salts can be aqueous or solid. (Or liquid or gas if you heat them up enough of course - but you shouldn't have any reactions involving that kind of thing.)
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scimus63
9
a good way to think of salts is an acid where the hydrogen is replaced by a metal. Salts are ionic compounds so will be solids, some will be soluble, some not!

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