Chemistry Answers

Determine the Molarity of a solution made by dissolving 21.6 grams of sodium carbonate, Na₂CO_3, in enough water to make 400.0 ml of solution.

How much acid and water are needed to dilute 12.0 M concentrated hydrochloric acid HCl, to make 4.00 liters of a 3.00 M solution?

How many grams of sodium bicarbonate, NaHCO₃, are needed to make 200.0 ml of a 0.250 M solution?

Calculate the freezing point of a 4.00 molal solution of methanol, CH₃OH.

Determine the boiling point of a 2.00 molal solution of potassium bromide, KBr. 

Calculate the molar mass of a nonelectrolyte if 40.0 grams of it dissolved in 200.0 grams of water lowers the freezing point to – 1.40 ° C.

Determine the Molarity of a solution made by dissolving 21.6 grams of sodium carbonate, Na₂CO_3, in enough water to make 400.0 ml of solution.

Calculate the pH of 0.01 M aqueous solution of sodium formate at 298 K. [Given: Ka (HCOOH) =1.7 × 10raise to the power -4 at 298K]

Calculate the degree of ionisation and the pH of a 0.01 M aqueous solution of formic acid at 298K. [Given, Ka (HCOOH) = 1.7 into 10 raise to the power -4 at 298K]. 

Calculate the pressure in a 212 Liter tank containing 23.3 kg of argon gas at 25°C? ( atomic weight Ar - 40 )