Problem 89
\(2.82 \mathrm{~g}\) of glucose is dissolved in \(30 \mathrm{~g}\) of water. The mole fraction of glucose in the solution is (a) \(0.01\) (b) \(0.99\) (c) \(0.52\) (d) \(1.66\)
Problem 90
What volume of water is to be added to \(100 \mathrm{~cm}^{3}\) of \(0.5 \mathrm{M} \mathrm{NaOH}\) solution to make it \(0.1 \mathrm{M}\) solution? (a) \(200 \mathrm{~cm}^{3}\) (b) \(400 \mathrm{~cm}^{3}\) (c) \(500 \mathrm{~cm}^{3}\) (d) \(100 \mathrm{~cm}^{3}\)
Problem 92
The final molarity of a solution made by mixing \(50 \mathrm{~mL}\) of \(0.5 \mathrm{M} \mathrm{HCl}, 150 \mathrm{~mL}\) of \(0.25 \mathrm{M} \mathrm{HCl}\) and water to make the volume \(250 \mathrm{~mL}\) is (a) \(0.5 \mathrm{M}\) (b) \(1 \mathrm{M}\) (c) \(0.75 \mathrm{M}\) (d) \(0.25 \mathrm{M}\)
Problem 93
A solution is made by dissolving \(49 \mathrm{~g}\) of \(\mathrm{H}_{2} \mathrm{SO}_{4}\) in \(250 \mathrm{~mL}\) of water. The molarity of the solution prepared is (a) \(2 \mathrm{M}\) (b) \(1 \mathrm{M}\) (c) \(4 \mathrm{M}\) (d) \(5 \mathrm{M}\)
Problem 94
What is the concentration of copper sulphate (in mol \(L^{-1}\) ) if \(80 \mathrm{~g}\) of it is dissolved in enough water to make a final volume of \(3 \mathrm{~L} ?\) (a) \(0.0167\) (b) \(0.167\) (c) \(1.067\) (d) \(10.67\)
Problem 95
\(4.28 \mathrm{~g}\) of \(\mathrm{NaOH}\) is dissolved in water and the solution is made to \(250 \mathrm{cc}\). What will be the molarity of the solution? (a) \(0.615 \mathrm{~mol} \mathrm{~L}^{-1}\) (b) \(0.428 \mathrm{~mol} \mathrm{~L}^{-1}\) (c) \(0.99 \mathrm{~mol} \mathrm{~L}^{-1}\) (d) \(0.301 \mathrm{~mol} \mathrm{~L}^{-1}\)
Problem 96
What volume of \(5 \mathrm{M} \mathrm{Na}_{2} \mathrm{SO}_{4}\) must be added to \(25 \mathrm{~mL}\) of \(1 \mathrm{M} \mathrm{BaCl}_{2}\) to produce \(10 \mathrm{~g}\) of \(\mathrm{BaSO}_{4} ?\) (a) \(8.58 \mathrm{~mL}\) (b) \(7.2 \mathrm{~mL}\) (c) \(10 \mathrm{~mL}\) (d) \(12 \mathrm{~mL}\)
Problem 99
What will be the molality of the solution made by dissolving \(10 \mathrm{~g}\) of \(\mathrm{NaOH}\) in \(100 \mathrm{~g}\) of water? (a) \(2.5 \mathrm{~m}\) (b) \(5 \mathrm{~m}\) (c) \(10 \mathrm{~m}\) (d) \(1.25 \mathrm{~m}\)
Problem 100
What will be the molality of chloroform in the water sample which contains 15 ppm chloroform by mass? (a) \(1.25 \times 10^{-4} \mathrm{~m}\) (b) \(2.5 \times 10^{-4} \mathrm{~m}\) (c) \(1.5 \times 10^{-3} \mathrm{~m}\) (d) \(1.25 \times 10^{-5} \mathrm{~m}\)
