Chemical Equilibrium

pH for 0.01 M NaOH solution is

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0.01 M NaOH,

M = 1 * 10^-2

pOH = 2

pH = 2

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2 weeks ago

K_p for the given reaction is (36 * 10^–2atm^–1) Find out K_c (M^–1) (nearest integer).

(2NO₂ N₂O₄)

(R=0.0821 atm. L/mol. K)

(T = 300K)

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K_p = K_c (RT)^D^ng

36 * 10^–2 = K_c (0.0821 * 300)^–1

K_c = 0.36 * 0.0821 * 300 = 8.86 » 9

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3 weeks ago

Ka values of three acids A, B and C are 10^–3, 5 * 10^–9, 9 * 10^–11 respectively. The acidic strength order of these acids is

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Higher the value of K_a more is the acidic strength.

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3 weeks ago

What is the pH of CH₃COO^–NH⁴⁺ salt?

Given K_a of CH₃COOH = 1.8 * 10^–6

K_b of NH₄OH = 1.8 * 10^–6

(At 25°C)

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$p H = \frac{p K_{w} + p K_{a} ? p K_{b}}{2}$

pK_a = pK_b

$p H = \frac{p K_{w}}{2} = 7$

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3 weeks ago

Complementary strand of DNA

ATGCTTCA is:

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Adenine base pairs with thymine with 2 hydrogen bonds and cytosine base pairs with guanine with 3 hydrogen bonds.

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3 weeks ago

A(g) ->B(g) + $\frac{1}{2}$ C(g)

In the about reaction, the correct relation between K_p, a and equilibrium pressure (p) is

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A(g) ->B(g) + $\frac{1}{2}$ (g)

Initial moles n 0 0

Eqb. moles n(1 – a) $\frac{n α}{2}$ n_a

total moles = $n (1 + \frac{α}{2})$

Eqb. pressure $\frac{(1 - α) p}{1 + \frac{α}{2}}$ $\frac{α p}{1 + \frac{α}{2}}$ $\frac{(\frac{α}{2}) p}{1 + \frac{α}{2}}$

$\frac{K_{p} = \frac{α p}{(1 + \frac{α}{2})} * {[\frac{α p}{(2 + α)}]}^{\frac{1}{2}}}{\frac{(1 + α) p}{1 + \frac{α}{2}}}$

$K_{p} = \frac{α^{\frac{3}{2}} p^{\frac{1}{2}}}{{(2 + α)}^{\frac{1}{2}} (1 - α)}$ &nbs

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A(g) ->B(g) + $\frac{1}{2}$ (g)

Initial moles n 0 0

Eqb. moles n(1 – a) $\frac{n α}{2}$ n_a

total moles = $n (1 + \frac{α}{2})$

Eqb. pressure $\frac{(1 - α) p}{1 + \frac{α}{2}}$ $\frac{α p}{1 + \frac{α}{2}}$ $\frac{(\frac{α}{2}) p}{1 + \frac{α}{2}}$

$\frac{K_{p} = \frac{α p}{(1 + \frac{α}{2})} * {[\frac{α p}{(2 + α)}]}^{\frac{1}{2}}}{\frac{(1 + α) p}{1 + \frac{α}{2}}}$

$K_{p} = \frac{α^{\frac{3}{2}} p^{\frac{1}{2}}}{{(2 + α)}^{\frac{1}{2}} (1 - α)}$

less

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3 weeks ago

Which of the following equilibrium will shift in forward direction on applying pressure?

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On increasing pressure, equilibrium moves in that direction where number of gaseous moles decreases.

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3 weeks ago

The ionization constant of HCN is 4.5 * 10^–10 at 298 K. Hydrolysis constant of sodium cyanide is

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3 weeks ago

For the given reaction

Which of the following is correct?

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In an exothermic reaction on decreasing temperature, reaction goes in the forward direction.

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3 weeks ago

The pH of 1 M CH₃COONa solution in water will be nearly (pKa for CH₃COOH = 4.74)

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