Question

Concentrated h2so4 is 98 by mass and has density 1.84gcm3 what volume of the water is make 5 litres of 0.50 M h2so4 acid solution

Answer 1

Explanation:

To make 0.5 M H2SO4, you need 0.5 moles/liter. To make 5 liters, you need 0.5 moles/L x 5 L = 2.5 moles of H2SO4.

Molar mass of H2SO4 is 98 g/mole. 2.5 moles x 98 g/mole = 245 g of H2SO4 needed.

1.84 g/ml (x ml) = 245 g and x = 133.15 ml needed, if it were pure, 100% H2SO4.

Correcting for the 98% purity, you need 133.15/0.98 = 135.87 ml of the 98% H2SO4.

You can adjust this to the number of sig.figs. required. It should be to 1 sig.fig. based on the 0.5 M and the 5 liters, but I'll leave that to you.