Question 1
A solution is prepared by adding 1.43 mol of KCl to 889 g of water. The concentration of KCl is ________ mol kg
-1.
◦ 1.61 × 10
-3◦ 622
◦ 0.622
◦ 1.27 × 10
3◦ 1.61
Question 2
A solution is prepared by adding 30.00 g of lactose (milk sugar) to 110.0 g of water at
The partial pressure of water above the solution is ________ Torr. The vapour pressure of pure water at 55 °C is 0.1553 bar. The MW of lactose is
◦ 1.670
◦ 94.1
◦ 169.4
◦ 116.3
◦ 92.7