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Svetach [21]
2 years ago
10

Assume after recording the mass of KHP on the weigh paper it was not completely transferred into the Flask. Your following titra

tion was completed correctly. Would your experimental value for concentration of NaOH be too high, too low, or unchanged as compared to the true value? Explain
Chemistry
1 answer:
maxonik [38]2 years ago
5 0

Answer:

unchanged

Explanation:

KHP is potassium hydrogen phthalate. It is a weak acid. It forms a colourless ionic weakly acidic solution which can be titrated against NaOH to determine the concentration of a sodium hydroxide solution. KHP is used as a primary standard. Its concentration depends on the mass of solid added and the volume of solution.

If all the KHP was not transferred into the flask, the experimental value of the concentration of NaOH remains unchanged as long as the titration was carried out correctly and following normal procedure. Only the concentration of the KHP will be affected by this error during calculation.

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elena-14-01-66 [18.8K]

The two compounds present in unpolluted air are carbon dioxide and water. You may think that carbn dioxide is a greenhouse gas, yes it is and at the same time not. There animals in the earth that produces carbon dioxide into the atmosphere, the carbon dioxide too, is also need for plan respiration. 

3 0
2 years ago
When 7.085 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 21.71 grams of CO2 and 10.37 grams of H
Taya2010 [7]

Answer:

- Empirical:

C_3H_7

- Molecular:

C_6H_{14}

Explanation:

Hello,

In this case, based on the information regarding the combustion, the moles of carbon turn out:

n_C=21.71gCO_2*\frac{1molCO_2}{44gCO_2}*\frac{1molC}{1molCO_2}=0.493molC

Moreover, the moles of hydrogen:

n_H=10.37gH_2O*\frac{1molH_2O}{18gH_2O}*\frac{2molH}{1molH_2O}=1.152molH

Thus, the subscripts of carbon and hydrogen in the hydrocarbon turn out:

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Now, looking for a suitable whole number we obtain the following empirical formula as 2.335 times 3 is 7 for hydrogen:

C_3H_7

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C_6H_{14}

Which is hexane.

Best regards.

6 0
3 years ago
In the chemical reaction below, calcium (Ca) and water (H2O) react to form calcium hydroxide (Ca(OH)2) and hydrogen gas (H2). Ca
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Answer:

C.

Explanation:

The mass of the reactants should not change, in fact it would be equal because the only thing that changes is the form in which your products are in. The reactants will still have the same amount of mass from the products as no products were removed or added, the structure changed, the mass did not.

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Answer:

It depends on whether the setting is hot or cold .-.

Explanation:

8 0
2 years ago
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oksian1 [2.3K]

Answer:

VC = 18

Explanation:

Since L is the midpoint and you have LV, you know that LC is also 9.

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2 years ago
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