When two transparent (clear) solutions were mixed, the resulting liquid became cloudy (because an insoluble solid has formed) and bubbles were seen (because a gas has formed). Note 1. (aq) = solution = transparent liquid; when '(aq) is also in the equation cloudy liquid, (g) when (aq) is also in the equation = bubbles in the liquid. Note 2. You cannot tell anything about the colors since this information is not included in the reaction equation.
7. FeSO4(aq) + Ba(NO3)2(aq) → BaSO4(s) + Fe(NO3)2(aq)
NaHCO3(aq) + HCl(aq) → NaCl(aq) + H2O(l) + CO2(g)