Calculate the pH of the following solutions:
0.02 mol of hydrochloric acid in 2L of solution.

Calculate the molar mass of the following substances :Hydrochloric acid, HCl

Calculate the pH of 0.005 M NaOH solution.

Calculate the pH of 0.2 M H_2SO_4 .

Solution of a weak acid and its anion (that is,its conjugate base) or of a base and its common cation are buffered. When we add a small amount of acid or base to any one of the, the pH of solution change very little. pH of buffer solution can be computed as for acidic buffer : pH=pK_(a)+ log.(["Conjugate base"])/(["Acid"]) for basic buffer : pOH=pK_(b)+log.(["Conjugate acid"])/([Base]) It is generly accepted that a has useful buffer cpacity (pH change resisting power) provided that the value of [salt or conjugate base] /[acid] for acidic buffer lies within the range of 1 : 10 to 1. Buffer capacity is maximum when [conjugate base] = [acid] Calculater the pH of a solution made by adding 0.01 mole of HCl in 100 mL of a solution which is 0.2 M in NH_(3)(pK_(b)=4.74) and 0.3 M in NH_(4)^(+) : (Assuming no change in volume )

Which of the following solutions has the highest pH?

What is the pH of 0.0001 M HCl solution?

Which of the following are present in a dilute aqueous solution of hydrochloric acid?

Calculate the number of moles of methanol in 5 L of its solution, if the density of solution is 0.981 kg L^(-1) (Molar mass of methanol = 32.0 g "mol"^(-1) ).