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4 years ago

12

"What volume of" a 0.300 M BaF2 "solution is needed to prepare" 240.0 mL of a 0.100 M F- solution

1 answer:

zhannawk [14.2K]4 years ago

6 0

Use M x V = M' x V'

0.300 x V = 0.100 x 250

V = .......... ml

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3 years ago

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

Mashutka [201]

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first write the equilibrium equaion ,

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

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

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and equation is;

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

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$P_H =- log[H^{+} ]$

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composiion ;

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

$[H^{+}] =antilog(-P_H)$

$[H^{+} ] =0.0014$

$c=0.0014\times \frac{1}{10}$

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

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3 years ago