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Roman55 [17]
3 years ago
9

How does light travel?

Chemistry
1 answer:
kipiarov [429]3 years ago
3 0
Through stored energy is how light travels
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You have 50 ml of a complex mixture of weak acids that contains some HF (pKa = 3.18) and some HCN (pKa = 9.21). Which is larger,
bonufazy [111]

Answer:

\frac{[F^{-}]}{[HF]} is larger

Explanation:

pK_{a}=-logK_{a} , where K_{a} is the acid dissociation constant.

For a monoprotic acid e.g. HA, K_{a}=\frac{[H^{+}][A^{-}]}{[HA]} and \frac{[A^{-}]}{[HA]}=\frac{K_{a}}{[H^{+}]}

So, clearly, higher the K_{a} value , lower will the the pK_{a}

In this mixture, at equilibrium, [H^{+}] will be constant.

K_{a} of HF is grater than K_{a} of HCN

Hence, (\frac{F^{-}}{[HF]}=\frac{K_{a}(HF)}{[H^{+}]})>(\frac{CN^{-}}{[HCN]}=\frac{K_{a}(HCN)}{[H^{+}]})

So, \frac{[F^{-}]}{[HF]} is larger

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3 years ago
based on the cause and effect relationship between the magnets, which phenomenon is the teacher modeling for her students.
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2 years ago
What's the preview of the scientific method
Dafna11 [192]

Explanation:

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According to Table I, which salt releases energy as it dissolves?
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2 years ago
Indicate the correct number of sig figs
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The answer to questions are

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