What is the concentration of a phosphoric acid solution of a 25.00 mL sample if the acid requires 42.24 mL of 0.135 M NaOH for n
2 answers:
Answer: The volume of 0.10 M NaOH required to neutralize 30 ml of 0.10 M HCl is, 30 ml.
Explanation:
According to the neutralization law,
where,
= molarity of NaOH solution = 0.135 M
= volume of NaOH solution = 42.24 ml
= molarity of
solution = ?M
= volume of
solution = 25 ml
= valency of
= 1
= valency of
= 3
Therefore, the concentration of 0.076 M of phosphoric acid of a 25 ml is required to neutralize 42.24 ml of 0.135 M NaOH.
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Answer :
AgBr should precipitate first.
The concentration of when CuBr just begins to precipitate is,
Percent of remains is, 0.0018 %
Explanation :
for CuBr is
for AgBr is
As we know that these two salts would both dissociate in the same way. So, we can say that as the Ksp value of AgBr has a smaller than CuBr then AgBr should precipitate first.
Now we have to calculate the concentration of bromide ion.
The solubility equilibrium reaction will be:
The expression for solubility constant for this reaction will be,
Now we have to calculate the concentration of silver ion.
The solubility equilibrium reaction will be:
The expression for solubility constant for this reaction will be,
Now we have to calculate the percent of remains in solution at this point.
Percent of remains =
Percent of remains = 0.0018 %
Answer:
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Explanation:
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