2 The precipitate formed when sodium hydroxide reacts with solutions containing metal ions is the corresponding METAL HYDROXIDE.
a Write word equations and symbol equations including state symbols)
to show how the following solutions react with sodium hydroxide:
magnesium sulfate, MgSO4
ii iron(II) sulfate, FeSO4
ili iron(III) chloride, FeCl3
iv copper(ll) chloride, CuCl2

The zinc within a copper-plated penny dissolves in hydrochloric acid if the copper coating is filed down in several spots (so that the hydrochloric acid can reach the zinc). the reaction between the acid and the zinc 2h+(aq)+zn(s)→h2(g)+zn2+(aq) . when the zinc in a certain penny dissolves, the total volume of gas collected over water at 25 °c is 0.947 l at a total pressure of 743 mmhg . (vapor pressure of water is 23.78 mmhg at 25 °c .) what mass of hydrogen gas is collected? answer in appropriate significant figures