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3 years ago

What is the concentration of the acid in this titration 1.2 m 2.4 m 1.95 m 0.98 m 1.98 m

Chemistry

2 answers:

tresset_1 [31]3 years ago

5 0

Answer:

1.95

Explanation:

Just did the test and it was correct!

Nezavi [6.7K]3 years ago

3 0

<u>Answer:</u> The correct answer is 1.95 M

<u>Explanation:</u>

To calculate the concentration of acid, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of unknown acid which is HCl.

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is $Ca(OH)_2$

We are given:

$n_1=1\\M_1=?M\\V_1=(45.5-0.0)=45.5mL\\n_2=2\\M_2=1.2M\\V_2=(37.5-0.5)=37mL$

Putting values in above equation, we get:

$1\times M_1\times 45.5=2\times 1.2\times 37\\\\M_1=1.95M$

Hence, the concentration of unknown HCl solution comes out to be 1.95 M.

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2 years ago

Will give lots of points if answered correctly. Determine the kb for chloroform when 0.793 moles of solute in 0.758 kg changes t

Liono4ka [1.6K]

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Explanation:

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As molality is the number of moles of solute present in kg of solvent. Hence, molality of given solution is calculated as follows.

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Now, the values of $K_b$ is calculated as follows.

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where,

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Substitute the values into above formula as follows.

$\Delta T_{b} = i\times K_{b} \times m\\3.80^{o}C = 1 \times K_{b} \times 1.05 m\\K_{b} = 3.62^{o}C/m$

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3 years ago

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Explanation:

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3 years ago

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Galina-37 [17]

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Now, you need to use Nernst formula to get the answer. I have attached a PDF with the work.

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3 years ago

Given the different molecular weights, dipole moments, and molecular shapes, why are their molar volumes nearly the same?

Marina CMI [18]

Answer:

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3 years ago