3 years ago

Can u pls help me with this question

Chemistry

1 answer:

katrin2010 [14]3 years ago

5 0

Answer:

Explanation:

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Which of the following best explains why bonds form between atoms?

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I believe the answer is D because atoms are always seeking to fill up their outer electron shell/valence shell and want to gain a full octet.

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Calculate the molar solubility of CaF2 at 25°C in a solution that is 0.010 M in Ca(NO3)2. The Ksp for CaF2 is 3.9 x 10-11.

madreJ [45]

Answer:

$Molar \ solubility=3.12x10^{-5}M$

Explanation:

Hello,

In this case, for the dissociation of calcium fluoride:

$CaF_2(s)\rightleftharpoons Ca^{2+}+2F^-$

The equilibrium expression is:

$Ksp=[Ca^{2+}][F^-]^2$

In such a way, via the ICE procedure, including an initial concentration of calcium of 0.01 M (due to the calcium nitrate solution), the reaction extent $x$ is computed as follows:

$3.9x10^{-11}=(0.01+x)(2*x)^2\\\\x=0.0000312M$

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$Molar \ solubility=3.12x10^{-5}M$

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Pls help me on this it’s past due ty

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2 years ago

Can u pls help me with this question ​

Can u pls help me with this question