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shepuryov [24]
2 years ago
7

In a titration experiment, 13.0 mL of an aqueous HCl solution was titrated with 0.2 M NaOH solution. The equivalence point in th

e titration was reached when 11.1 mL of the NaOH solution was added. What is the molarity of the HCl solution? HCl molarity
Chemistry
1 answer:
Ostrovityanka [42]2 years ago
8 0

Answer:

The molarity of the HCl solution is 0.17M

Explanation:

When a titration occurs between an acid and a base it is called neutralization.

The formula to calculate the concentration of the acid is:

Ca*Va=Cb*Vb

where Ca and Cb are the concentrations of the acid and the base respectively and Va and Vb are the volumes of the acid and the base.

As HCl is an acid, solve the equation for Ca:

Ca=\frac{Cb*Vb}{Va}

Replacing values:

Ca=\frac{0.2MNaOH*11.1mLNaOH}{13.0mLHCl}

Ca=0.17M

Therefore the molarity of the HCl solution is 0.17M

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6. The Earth’s electric field is directed vertically downward; at the ground level its strength is E = 130 N/C, and at an altitu
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Answer:

5.31x10⁻⁶ C

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The electric field is perpendicular to the bottom and the top of the cube, so the total flux is the flux at the superior face plus the flux at the inferior face:

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Фtotal = 70A*(-1) + 130*A*1

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By Gauss' Law, the flux is:

Фtotal = q/ε, where q is the charge, and ε is the permittivity constant in vacuum = 8.854x10⁻¹² C²/N.m²

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8 0
3 years ago
The p-value of a statistical test depends on all of the following, except:
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Answer:

The correct option is e.

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s is standard deviation.

n is sample size.

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