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Lemur [1.5K]
3 years ago
6

What is another name for the representative elements?

Chemistry
2 answers:
jeka943 years ago
6 0

Answer:

Group A elements or the main group

Another name for the representative elements are  the Group A elements or the main group elements

Explanation:

GaryK [48]3 years ago
5 0

Answer:

Another name for the representative elements are the Group A elements or the main group elements.

Explanation:

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The ph of a 0.175 m aqueous solution of a weak acid is 3.52. what is ka for this acid?
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Hey there!

pH = - log [ H⁺  ] = 3.52

[ H⁺ ] = 10^-pH

[ H⁺] = 10^ ( -3.52 )

[H⁺] = 3.02*10⁻⁴ M

[HA] =0.175 M

Therefore:

Ka = [ H⁺]* [A⁻] / [ HA]

Ka =  (3.02*10⁻⁴)² /  0.175

Ka = 9.1204*10⁻⁸ / 0.175

Ka = 5.2*10⁻⁷


Hope that helps!


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