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2 years ago

I NEED HELP GUYS PLEASE!!!!! this is due today

Chemistry

2 answers:

LiRa [457]2 years ago

3 0

Answer:

B. 7cm

Explanation:

Double the structure means 3.5+3.5 OR 3.5 ×2

Which is 7 cm

skad [1K]2 years ago

3 0

B because 3.5x2=7 duplicate means 2

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2 years ago

A generic salt, AB 2 , has a molar mass of 345 g/mol and a solubility of 8.70 g/L at 25 °C. AB 2 (s) − ⇀ ↽ − A 2 + (aq) + 2B − (

Brrunno [24]

Answer : The value of $K_{sp}$ of the generic salt is, $1.60\times 10^{-5}$

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First we have to calculate the moles of salt $(AB_2)$

$\text{Moles of }AB_2=\frac{\text{Mass of }AB_2}{\text{Molar mass of }AB_2}$

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$\text{Moles of }AB_2=\frac{8.70g}{345g/mol}=0.0252mol$

Now we have to calculate the concentration of $A^{2+}\text{ and }B^-$

The equilibrium chemical reaction will be:

$AB_2(s)\rightleftharpoons A^{2+}(aq)+2B^-(aq)$

Concentration of $A^{2+}$ = $\frac{0.0252mol}{1L}=0.0252M$

Concentration of $B^-$ = $\frac{0.0252mol}{1L}=0.0252M$

The solubility constant expression for this reaction is:

$K_{sp}=[A^{2+}][B^-]^2$

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$K_{sp}=(0.0252M)\times (0.0252M)^2$

$K_{sp}=1.60\times 10^{-5}$

Thus, the value of $K_{sp}$ of the generic salt is, $1.60\times 10^{-5}$

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2 years ago

Read 2 more answers