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If K(a) for formic acid is 2.0 xx 10^(-4...

If `K_(a)` for formic acid is `2.0 xx 10^(-4)` mol `L^(-1)` then `K_(h)` for `HCOO^(-)` is

A

`2.0 xx 10^(-10)`

B

`1.414 xx 10^(-12)`

C

`10^(-13)`

D

`5 xx 10^(-11)`

Text Solution

Verified by Experts

The correct Answer is:
D
`K_(h)=(K_(w))/(K_(a))=(10^(-14))/(2.0 xx 10^(-4))`
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DINESH PUBLICATION-IONIC EQUILIBRIUM -BRAIN TEASERS -4
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  2. For which of the following shall the ratio of K(p)//K(c) is unity at 3...

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  3. If K(a) for formic acid is 2.0 xx 10^(-4) mol L^(-1) then K(h) for HCO...

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  4. The solubility of AgCl in 0.2 M NaCl is [K(sp) AgCl =1.8 xx 10^(-10)]

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  5. What is the pH of 10^(-3) M ammonia cyanide solution, if K(HCN)=7.2 xx...

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  6. If the dissociation constants of two weak acids HA(1) and HA(2) are K(...

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  7. The pK(a)of an acid having ionisation constant 1 xx 10^(-3) is

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  8. In a mixture of weak acid and its salt, the ratio of concentration of ...

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  9. If the solubility of lithium sodium hexafluorido aluminate, Li(3)Na(3)...

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  10. What will be the hydrogen ion concentration of a solution obtained by ...

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  11. The pH of 10^(-8) M NaOH will be

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  12. The pH of a buffer solution of 0.1 M CH(3)COOH and 0.1 MCH(3)COONa is ...

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  13. If the equilibrium concentration of the components in a reaction A+...

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  14. Which of the following when added to 35 mL of the 1.0 M solution of KO...

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  15. The concentration of acetic acid (K(a)=1.8 xx 10^(-5)) required to giv...

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  16. If 20 cc. of HCl solution is exactly neutralised by 40 cc of 0.05 N Na...

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  17. If, H(2)(g)+Cl(2)(g)rarr 2HCl(g) , Delta H^(@)=-44 Kcal 2Na(s)+2HCl...

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  18. For the reaction C(6)H(12)(l)+9O(2)(g) rarr 6H(2)O(L)+6CO(2)(g) Delt...

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  19. Which causes a largest change in pH on addition to 20ml 0.1 M acetic a...

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  20. The equation C (graphite) +O(2)(g) CO(2)(g) Delta H=-395.5kJ can...

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