Salt of Weak Acid and Strong Base

Q. 15.One litre solution contains 1M HOCl [pka=8] and 1M NaOH. What is the pH of the solution:

Q. 11 The mass of P4O10 produce if 440 gm of P4S is mixed with 384 gm of O2 Is given, P4S3 + O2 ----> P4O10 + SO2 OPTIONS->> 568gm, 426gm , 284gm, 396gm.

Q. Calculate the pH of 1 M $C{H}_{3}COONa$ solution. $(K_a=1.8\times {10}^{-5})$
Take $log\left(1.8\right)=0.26$

1. 9.37
2. 10.46
3. 8.52
4. 11.49

Q. the ph of 0.2M aqueous solution of NH4cl will be (pkb of NH3=4.74, LOg 2=0.3

Q. $K_a$ for butyric acid is $2.0\times {10}^{-5}$. Calculate pH and hydroxyl ion concentration in $0.2M$ aqueous solution of sodium butyrate.

1. $pH=5;[OH{]}^{-}={10}^{-9}M$
2. $pH=5;[OH{]}^{-}={10}^{-5}M$
3. $pH=9;[OH{]}^{-}={10}^{-9}M$
4. $pH=9;[OH{]}^{-}={10}^{-5}M$

Q. A solution of pH 2 is more acidic than the solution of pH 6 by a factor of 1. 100 2. 1000 3. 4000 4. 10000

Q. Q. The pH of 1 litre solution of strong monobasic acid is 2. Find the mount of water in litres added so that its new pH will be 4

Q. 15. Calculate the mass of 1u in gram

Q. what is ph of 10^{-9} M aqueous solution of HCl

Q. 4 ml of HCl solution of pH = 2 is mixed with 6 ml of NaOH solution of pH = 12. What would be the final pH of solution ? log 2 = 0.3 (a) 10.3 (b) 11.3 (c) 11 (d) 4.3

Q. 0.1 M weak acid HA (pH 3) is titrated with0.05 M NaOH solution. Calculate the pH (approx.)when 25% of acid has been neutralised. (log 3=0.48)

Q. The pH of a solution at 25^° C which has twice as many hydroxide ion as in pure water at 25^° C will be (1)14 (2)9 (3)6.699 (4)7.30

Q.

Which of the following correctly represents conjugate acid-base pair?

1. HCl, NaOH

2. HCl, Cl^-

3. NH₃, H₂O

4. BF₃, NH₃

Q. 25. Calculate the pH of a solution obtaining by mixing 200ml of. 1M CH3COOH (Ka=10-5) and 50ml of. 2M Ca(OH)2

Q. 29.What will happen if the pH of the solution of 0.001 M Mg(NO3)2 solution is adjusted to pH = 9 ( Ksp Mg(OH)2 = 8.9 X 10-12) a) ppt will take place b) ppt will not take place c) solution will be saturated d) None of the above

Q. if pH value of a solution is 3 and by adding water , it becomes 6, then the dilution is increased by

Q. Equal volumes of 2 solutions of NaOH one having ph=10 and other having ph=12 are mixed together. The pOH value for the resul†an t solution is

Q. 48.How to calculate active mass of 5 g CaO

Q. $p{K}_a$ of $C{H}_{3}COOH$ is 4.74. The pH of 0.01 M $C{H}_{3}COONa$ is

1. 4.74
2. 8.37
3. 9.48
4. None of these

Q. 13. What is the difference in pH for 1/3 and 2/3 stages of neutralisation of 0.1 M CH3COOH with 0.1 M NaOH?Also explain

Q. what are the formulas to find out pH of solutions with different combinations of weak/strong acid/base

Q. 37. Whai formula for calculation of ph of aqueous solution of NaCN

Q. 100 ml of each HCl solution having pH=5 and NaOH having pH=8 is mixed. How much volume of N/100 NaOH is required to neutralise to 20 ml of this mixture?

Q. 0.1M weak acid HA ph=3 is titrated with 0.05M NaOh solution.calculate the ph wen 25% of acid has beem neutralised.

Q. What is the PH of 1M HCL solution? FIND its pH?

Q. Calculate the degree of hydrolysis ($h$) of a $0.1M$ sodium acetate solution at $298K$.
Given: $K_a=1.8\times {10}^{-5}$

1. $8.42\times {10}^{-5}$
2. $7.42\times {10}^{-6}$
3. $7.42\times {10}^{-5}$
4. $8.42\times {10}^{-6}$

Q. 6. Which among the solutions given below will not show a change in pH on dilution? (I). 0.1 M NH4COOCH3, (II). 0.1 M NaCl, (III). 0.1 M NH4OH, (IV). 0.01 M H2SO4. A. I and II. B. I, II and IV. C. I and III. D. III and IV.

Q. what is the pH of 0.0001 M HCl solution

Q. 0.1 M weak acid HA (pH = 3) is titrated with 0.05 M NaOH solution. Calculate the pH (approx.) when 25% of acid has been neutralised. (\log 3 = 0.48)

Q. 21. Calculate the PH of a solution which contain 9.9 ml 1 M HCL and 100ml of 0.1 M NaOH