Advertisements
Advertisements
Question
The pH of a weak monoacidic base is 11.2, and its OH– ion concentration is ______.
Options
1.585 × 10–3 mol dm–3
3.010 × 10–11 mol dm–3
3.010 × 10–3 mol dm–3
1.585 × 10–11 mol dm–3
Advertisements
Solution
The pH of a weak monoacidic base is 11.2, its OH– ion concentration is 1.585 × 10–3 mol dm–3.
Explanation:
pOH of the solution is given as:
pOH = 14 – pH
= 14 – 11.2
= 2.8
pOH = – log10[OH–]
log10[OH–] = – pOH
= – 2.8
= – 2 – 0.8 – 1 + 1
= – 3 + 0.2
= `overline(3)`.2
[OH–] = antilog `overline(3)`.2 = 1.585 × 10–3 mol/dm–3
APPEARS IN
RELATED QUESTIONS
The concentration of hydrogen ion in a sample of soft drink is 3.8 × 10–3 M. what is its pH?
It has been found that the pH of a 0.01M solution of an organic acid is 4.15. Calculate the concentration of the anion, the ionization constant of the acid and its pKa.
Calculate the pH of the following solution:
2 g of TlOH dissolved in water to give 2 litre of solution.
Calculate the pH of the following solution:
0.3 g of NaOH dissolved in water to give 200 mL of solution.
Calculate the pH of the following solution:
1mL of 13.6 M HCl is diluted with water to give 1 litre of solution.
The pH of 0.005M codeine (C18H21NO3) solution is 9.95. Calculate its ionization constant and pKb.
The pH of milk, black coffee, tomato juice, lemon juice and egg white are 6.8, 5.0, 4.2, 2.2 and 7.8 respectively. Calculate corresponding hydrogen ion concentration in each.
Calculate the pH of the resultant mixtures: 10 mL of 0.1M H2SO4 + 10 mL of 0.1M KOH
What is the pOH if the hydrogen ion concentration in solution is 1 × 10–3 mol dm–3?
Which of the following is INCORRECT statement?
The pH of 0.001 M NaOH(aq) solution will be:
The CORRECT match between transition metal ion and its colour in aqueous solution.
Select the INCORRECT relation.
Aqueous solution of ____________ will turn red litmus blue.
The number of ions given by Na3[Fe(CN)6] in aqueous solution is ____________.
Equal volumes of three acid solutions of pH 1, 2 and 3 are mixed in a vessel. What will be the H+ ion concentration in the mixture?
What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed?
The pH of an aqueous solution is Zero. The solution is ____________.
The Ka value for HCN is 10−9. What is the pH of 0.4 M HCN solution?
In which of the following solvents is silver chloride most soluble?
The degree of dissociation of 0.1 M monobasic acid is 0.4%. Its dissociation constant is ______.
Define pOH.
Define pOH.
Define pH.
Derive relationship between pH and pOH.
Define pH.
Derive the relation pH + pOH = 14.
Define pOH.
Define pOH.
