Chemistry questions
29404 published questions with worked solutions.
- The decreasing order of strength of the bases OH^- , NH_2^- , H-C C^- and CH_3-CH_2^- is
- The concentration of hydrogen ion in a sample of soft drink is 3.8 10^ -3 , M . The value of its pH is
- If the ionisation constant of acetic acid is 1.8 10^ -5 , at what concentration will it be dissociated to 2% ?
- The dissociation constant of acetic acid at a given temperature is 1.69 10^ -5 . The degree of dissociation of 0.01 M acetic acid...
- A 0.2 molar solution of formic acid is 3.2% ionised. Its ionisation constant is
- For a reaction, CH_3COOH(aq) H^+(aq) + CH_3COO^-(aq) or HAc(aq) H^+(aq) + Ac^-(aq) The value of pH of the solution resulting on...
- The pH of 0.10 N acetic acid having K_a = 1.8 10^ -5 is
- A 0.01 M ammonia solution is 5% ionised. The concentration of OH^- ion is
- 2 g of NaOH is dissolved in water to make 1 L solution. The pH of solution is
- The pH of 0.01 M NaOH(aq) solution will be
- The pH of a mixture when a 50 mL solution pH = 1 is mixed with a 50 mL of pH = 2 is
- Assuming complete ionisation, the pH of 0.1 M HCl is 1. The molarity of H_2SO_4 with the same pH is
- How many litres of water must be added to 1 L of an aqueous solution with a pH of 1 to create an aqueous solution of pH of 2?
- If 50 mL of 0.1 HBr is mixed with 50 mL 0.2 M NaOH, find pH of resulting mixture
- A weak base BOH is titrated with a strong acid HA. When 10 mL of HA is added, pH is found to be 9.00 and when 25 mL is added, pH...
- Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations I. 60 mL M 10 HCl + 40...
- The p K_b for fluoride ion at 25 ^ is 10.83, the ionisation constant of hydrofluoric acid at this temperature is
- The pH of 0.005 M codeine ( C_ 18 H_ 21 NO_3 ) solution is 9.95. Its p K_b value is
- The p K_a of acetic acid and p K_b of ammonium hydroxide are 4.76 and 4.75 respectively. Calculate the pH of ammonium acetate...
- pH of a salt solution of weak acid ( p K_a = 4) and weak base ( p K_b = 5) at 25 ^ is