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3 years ago

The __________________ of a solution tells how many moles of solute are present per liter.

Chemistry

2 answers:

Stels [109]3 years ago

5 0

Answer:

The MOLARITY of a solution tells how many moles of solute are present per liter

Explanation:

Molarity is a sort of concentration.

It is written as M (mol/L)

Soloha48 [4]3 years ago

3 0

Answer: molarity

Explanation: molarity is expressed as number of moles of a solute in one litre of a solution, that is mol/litre. Molarity is the unit of concentration.

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What would be the composition and ph of an ideal buffer prepared from lactic acid (ch3chohco2h), where the hydrogen atom highlig

Mashutka [201]

Answer:

$P_H =2.86$

$c=1.4\times 10^{-4}$

Explanation:

first write the equilibrium equaion ,

$C_3H_6O_3$ ⇄ $C_3H_5O_3^{-} +H^{+}$

assuming degree of dissociation $\alpha$ =1/10;

and initial concentraion of $C_3H_6O_3$ =c;

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concentration of $C_3H_6O_3 = c-c\alpha$

$[C_3H_5O_3^{-} ]= c\alpha$

$[H^{+}] = c\alpha$

$K_a = \frac{c\alpha \times c\alpha}{c-c\alpha}$

$\alpha$ is very small so $1-\alpha$ can be neglected

and equation is;

$K_a = {c\alpha \times \alpha}$

$[H^{+}] = c\alpha$ = $\frac{K_a}{\alpha}$

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$P_H =-logK_a + log\alpha$

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$P_H =2.86$

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$c=\frac{1}{\alpha} \times [H^{+}]$

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4 years ago