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Oksana_A [137]
3 years ago
15

Standardization of a Borax solution (Na2B4O7). You are given a 1.044 M solution of H2SO4. It takes 2.63 mL of this H2SO4 to reac

h the end point. Knowing it takes 1 H2SO4 to neutralize 2 Na2B4O7, what was the concentration of this Borax solution?
Chemistry
1 answer:
strojnjashka [21]3 years ago
8 0

The question is incomplete, the complete question is:

Standardization of a Borax solution (Na2B4O7). A student titrates a 20.00 mL sample of an aqueous borax solution with 1.044 M H2SO4. It takes 2.63 mL of acid to reach the equivalence point. Knowing it takes 1 H2SO4 to neutralize 2 Na2B4O7, what was the concentration of this Borax solution?

<u>Answer: </u>The concentration of borax solution is 0.069 M.

<u>Explanation:</u>

To calculate the concentration of borax solution, the formula used is:

n_1C_1V_1=n_2C_2V_2 ....(1)

where,

n_1, C_1\text{ and }V_1 are the n-factor, concentration and volume of sulfuric acid

n_2,C_2\text{ and }V_2 are the n-factor, concentration and volume of borax solution.

We are given:

n_1=1\\C_1=1.044M\\V_1=2.63mL\\n_2=2\\C_2=?M\\V_2=20mL

Putting values in equation 1, we get:

1\times 1.044\times 2.63=2\times C_2\times 20\\\\C_2=\frac{1\times 1.044\times 2.63}{2\times 20}\\\\C_2=0.069M

Hence, the concentration of borax solution is 0.069 M.

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