5. NH04/3. What volume of 0.500 mol dm−3 HCl(aq) is required to react completely
with 10.0 g of calcium carbonate according to the equation below?
–CaCO3(s) + 2HCl(aq) → CaCl2(aq)
+ H2O(l)
+ CO2(g)
–A. 100 cm3 B.
200 cm3 C. 300 cm3 D. 400 cm3
6. MS05/4. Which solution contains the greatest amount (in mol)
of solute?
–A. 10.0
cm3 of 0.500 mol dm–3 NaCl
–B. 20.0
cm3 of 0.400 mol dm–3 NaCl
–C. 30.0
cm3 of 0.300 mol dm–3 NaCl
–D. 40.0
cm3 of 0.200 mol dm–3 NaCl