Extra Practice Questions Ch. 11, 13, and 14
11.131 Treatment of 1.385g of an unknown
metal M with an excess of aqueous HCl evolved a gas that was found to have a volume of
382.6ml at 20°C and 755mmHg pressure.
Heating the reaction mixture to evaporate the
water and remaining HCl then gave a white
crystalline compound, MClx, After dissolving
the compound in 25.0g of water the melting
point of the resulting solution was -3.53°C.
a. How many moles of H2 gas are evolved?
Reference: McMurry and Fay, Chemistry 4th edition
11.131 Treatment of 1.385g of an unknown
metal M with an excess of aqueous HCl evolved a gas that was found to have a volume of
382.6ml at 20°C and 755mmHg pressure.
Heating the reaction mixture to evaporate the
water and remaining HCl then gave a white
crystalline compound, MClx, After dissolving
the compound in 25.0g of water the melting
point of the resulting solution was -3.53°C.
a. How many moles of H2 gas are evolved?
Reference: McMurry and Fay, Chemistry 4th edition
