7. A. How many moles of Calcium hydroxide (CaOH2) are needed to completely react with 14.5 mol of Phosphoric acid (H3PO4)?

Chemistry

1 answer:

Artyom0805 [142]3 years ago

6 0

Answer:

moles of calcium hydroxide= 21.75 mol

a) 43.5 mol

b) 7.25 mol

Explanation:

Please see the attached picture for the full solution.

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The drop-counter is misaligned with the buret, causing it to miss counting every one out of five drops of base added to the HCl.

Airida [17]

Answer:

Less than

Explanation:

According to the question, the drop counter is counting four out of five drops of base added to the HCl. So when the titration will reach to the end point the volume of Base recorded will be less than the actual volume of the base dropped in the solution.

We will use law of equivalence for the calculation of concentration of HCl,

$M_1V_1 = M_2V_2$

Where, $M_1$ and $V_1$ are molarity and volume of HCl and $M_2$ and $V_2$ are molarity of volume of the base added.

Thus concentration of HCl will be calculated as,

$M_1=\frac{M_2V_2}{V_1}$

As the recorded $V_2$ is less than the actual amount present in the solution, the calculated value of concentration of HCl will also be less than the actual.

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3 years ago

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Nataly [62]

From the pair of values given, the ratio of the volume to the temperature for the first data pair is, 0.0026 cm³/K

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A ratio is a comparison between two quantities showing how much one quantity differs from another.

From the data given, the first data pair is as follows ;