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4 years ago

10

Which grouping of the three phases of chlorine is listed in order from left to right for increasing distance between chlorine mo

lecules?
a. liquid, solid, gas?

1 answer:

GenaCL600 [577]4 years ago

8 0

Answer:
Solid, Liquid, Gas

Hope it helps! ^^

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$\text{Moles of }NaOH=\text{Concentration of }NaOH\times \text{Volume of solution}}=0.160M\times 0.500L=0.08mol$

and,

$\text{Moles of }HA=\text{Concentration of }HA\times \text{Volume of solution}}=0.200M\times 0.585L=0.117mol$

The balanced chemical reaction is:

$HA+(aq)+OH^-(aq)\rightarrow H_2O(l)+A^-(aq)$

Moles of HA left = 0.117 mol - 0.08 mol = 0.037 mol

Moles of $A^-$ = 0.08 mol

The expression used for the calculation of $pK_a$ is,

$pK_a=-\log (K_a)$

Now put the value of $K_a$ in this expression, we get:

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Using Henderson Hesselbach equation :

$pH=pK_a+\log \frac{[Salt]}{[Acid]}$

$pH=pK_a+\log \frac{[A^-]}{[HA]}$

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$pH=4.89+\log (\frac{0.08}{0.037})$

$pH=5.22$

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