beatrixvarshave
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If it requires 25.0 milliliters of 1.0 molar HCl to neutralize 45.0 milliliters of NaOH, what is the concentration of the NaOH solution? Balanced equation: NaOH + HCl yields NaCl + H2O (3 points) Select one: a. 0.56 M NaOH b. 0.82 M NaOH c. 1.1 M NaOH d. 1.8 M NaOH

Respuesta :

CaVa=CbVb
1×25=45y
Y=25÷45
Y=0.56

Answer: The correct option is a.

Explanation: We are given a balanced chemical equation for an acid-base reaction:

[tex]NaOH+HCl\rightarrow NaCl+H_2O[/tex]

We need to find the concentration of base when it is neutralized by an acid.

For the neutralization reaction, we use the formula:

[tex]M_1V_1=M_2V_2[/tex]

where, [tex]M_1\text{ and }V_1[/tex] are the molarity and volume of acid.

and [tex]M_2\text{ and }V_2[/tex] are the molarity and volume of base.

In the given question,

[tex]M_1=1.0M\\V_1=25mL\\V_2=45mL\\M_2=?M[/tex]

Putting all the values, in above equation, we get

[tex]1.0M\times 25mL=M_2\times 45mL[/tex]

[tex]M_2=0.56M[/tex]

Hence, the correct option is a.) 0.56M NaOH.

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