Recent questions tagged sat

$pH$ of a mixture of 1 M benzoic acid ($pK_a$ = 4.20) and 1 M solution benzoate is 4.5. In 300 mL of buffer solution, volume of benzoic acid solution is

asked Nov 27, 2013 by mosymeow_1

1 answer

$pH$ of the solution containing 50.0 mL of 0.3 M HCl and 50.0 mL of 0.4 M $NH_3$ is

asked Nov 27, 2013 by mosymeow_1

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$pK_{a1}$ and $pK_{a2}$ of $H_2CO_3$ are 6.38 and 10.26 respectively. The $pH$ of 1 M and 0.1 M $NaHCO_3$ are

asked Nov 27, 2013 by mosymeow_1

1 answer

The hydronium ion concentration in pure water is $1 \times 10^{-7}$ mol$L^{-1}$. The degree of dissociation of water is

asked Nov 27, 2013 by mosymeow_1

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To 10 mL of aqueous solution some strong acid having $pH$ = 2 is mixed with $pH$ = 4.0. The $pH$ of resulting solution is

asked Nov 27, 2013 by mosymeow_1

1 answer

The dissociation constant of certain weak acid HA is $1 \times 10^{-4}$. The equilibrium constant for its reaction with strong base BOH is

asked Nov 27, 2013 by mosymeow_1

1 answer

The $pH$ of 0.1 M solution of $NH_4OH$ (having dissociation constant $K_b = 1.0 \times 10^{-5})$ is equal to

asked Nov 27, 2013 by mosymeow_1

1 answer

A solution was prepared by dissolving 0.0005 mol of $Ba(OH)_2$ in 100 mL of the solution. If the base is assumed to ionise completely, the $pOH$ of the solution will be

asked Nov 27, 2013 by mosymeow_1

1 answer

The value of $K^{sp}$ of $HgCl_2$ at room temperature is $4 \times 10^{-15}$. The concentration of $Cl^-$ ion in its aqueous solution at saturation point is

asked Nov 27, 2013 by mosymeow_1

1 answer

The dissociation constants of two acids $HA_1$ and $HA_2$ are $3.0 \times 10^{-4}$ and $1.8 \times 10^{-5}$ respectively. The relative strengths of the acids will be

asked Nov 27, 2013 by mosymeow_1

1 answer

The $pH$ of a dilute solution of acetic acid was found to be 4.3. The addition of a small crystal of sodium acetate will cause $pH$ to

asked Nov 27, 2013 by mosymeow_1

1 answer

Degree of dissociation of an acid HCl is 95%. 0.192 g of the acid is present in 0.5 L of solution. The pH of the solution is

asked Nov 23, 2013 by mosymeow_1

1 answer

The pH of pure water at $80^\circ C$ will be

asked Nov 23, 2013 by mosymeow_1

2 answers

If the solubility of $Ag_2CrO_4$ is S mole/litre. Its solubility product is

asked Nov 23, 2013 by mosymeow_1

2 answers

$NH_4OH$ is a weak base but it becomes still weaker in the aqueous solution of

asked Nov 23, 2013 by mosymeow_1

1 answer

Conjugate base of Hydrazoic acid is

asked Nov 23, 2013 by mosymeow_1

2 answers

Which of the following can act both as a Bronsted acid and a Bronsted base?

asked Nov 23, 2013 by mosymeow_1

2 answers

According to the Lewis acid-base concept

asked Nov 23, 2013 by mosymeow_1

1 answer

Which one of the following is a Bronsted acid but not a Bronsted base?

asked Nov 23, 2013 by mosymeow_1

1 answer

What are the units of Equilibrium equations $K_p$ and $K_c$ when $\Delta n_g < 0$ respectively ?

asked Nov 15, 2013 by mosymeow_1

1 answer

Specify the unit of Equlibrium Constant of the following reaction. $ Fe^{3+} (aq) + SCN^- (aq) \rightleftharpoons Fe(SCN)^{2+} (aq) $

asked Nov 13, 2013 by mosymeow_1

1 answer

At the boiling point of a liquid its ________ becomes equal to the atmospheric pressure.

asked Nov 13, 2013 by mosymeow_1

1 answer

0.5g of a mixture of $K_2CO_3$ and $Li_2CO_3$ required 30ml of 0.25N HCl solution for neutralization.What is % composition mixture ?

asked Nov 6, 2013 by sreemathi.v

1 answer

The vapour density of a mixture containing $NO_2$ and $N_2O_4$ is 38.3 at $27^{\large\circ}C$.Calculate the mole of $NO_2$ in 100g mixture

asked Oct 31, 2013 by sreemathi.v

1 answer

Calculate the number of atoms of oxygen present in 88g $CO_2$.What would be the weight of CO having the same no of oxygen atoms ?

asked Oct 30, 2013 by sreemathi.v

1 answer

Calculate molecules of methane,C and H atoms in 25g methane

asked Oct 30, 2013 by sreemathi.v

1 answer

How many EDTA (ethylene diamine tetracetic acid)molecules are required to make an octahedral complex with a $Ca^{2+}$ ion ?

asked Oct 30, 2013 by sreemathi.v

2 answers

3.0mole NaOH solution has a density of 1.110g/ml.The molarity of the solution is

asked Oct 29, 2013 by sreemathi.v

1 answer

If $a_k$ is the coefficient of $x^k$ in the expansion of $(1+x+x^2)^n$ for $k=0,1,2.......,2n$ then $a_1+2a_2+3a_3+.....+2na_{2n}$ is equal to

asked Oct 24, 2013 by meena.p

1 answer

Insulin contains 3.4% sulphur.Then the minimum molecular mass of the insulin is about

asked Oct 22, 2013 by sreemathi.v

2 answers

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