Question

10 g of Magnesium oxide is added to 100 cm 3 hydrochloric acid 2.0 mol dm -3 .
Calculate the mass of Magnesium Oxide that has reacted.
(RAM: O=16, Mg=24)

Answer 1

2,0 mole dm^-3=2 M

100 cm^3=0,1 l

Molar MgO=40

v(MgO)=0,25

v(HCl)=0,2 mole

reation

$MgO+2HCl=MgCl_2+H_2O$

v_react(MgO)=1/2v_react(HCl)

v_react=(MgO)=0,1