What would be the environment if a solution containing 20 g of sodium hydroxide was added to 500 g of sulfuric acid solution?

1) The molar mass of sulfuric acid is: 1 * 2 + 32 + 16 * 4 = 98.
2) The amount of sulfuric acid substance is: 500/98 = 5.1 mol – excess.
3) Molar mass of sodium hydroxide: 23 + 1 + 16 = 40.
4) The amount of sodium hydroxide substance is: 20/40 = 0.5 mol – a deficiency.
The environment is determined by the excess. In this problem, sulfuric acid is in excess, which means that the solution medium will be acidic.