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3 years ago

Which scientist is associated with the discovery of the electron? 1. rutherford 2. dalton 3. millikan 4. bohr 5. thomson?

Chemistry

1 answer:

Gelneren [198K]3 years ago

3 0

J.J Thomson was the one who discovered the electron so your answer is 5. or E

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A certain weak acid, HA, has a Ka value of 2.6×10−7. Calculate the percent ionization of HA in a 0.10 M solution.

Andrej [43]

Answer:

The percent ionization is 0,16%

Explanation:

The percent ionization is defined as the number of ions that exist in a substance.

$PI=\frac{[A-]}{[HA]} x100$

First, we find the [A-] using the ka equation

HA ⇄ $H^{+} + A^{-}$

[H+] = [A-]

$Ka=\frac{[H+][A-]}{[HA]}\\ \\$

since the ionization constant is very small we can assume that the final concentration of [HA] is the same

$Ka=\frac{[H+]^{2} }{[HA]} \\\\$

$[H+]=\sqrt[2]{Ka.[HA]} \\\\$

$[H+] =\sqrt{(2,610^{-7} )(0,1)} = 1,61210^{-4}$

Now we calculate the percent ionization using these values

$PI=\frac{1,61210^{-4} }{0,1} X100$

PI=0,16%

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4 years ago

What is 0.000345 expressed in scientific notation?

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0.000345 in scientific notation is 3.45*10^-4

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What is the most important scientific process

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If you combined neon, argon and helium together, what would you expect to happen?

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