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SVEN [57.7K]
3 years ago
6

A student noticed while doing the neutralization experiment that the calorimeter kept getting warmer. how would this error affec

t the final calculation for the δhneut of each reaction? would it be overestimated, underestimated or remain unaffected? explain your reasoning.
Chemistry
1 answer:
fiasKO [112]3 years ago
8 0
The result will be underestimated since heat is lost to surrounding air. Enthalpy change of neutralisation will thus be lower than actual
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3 years ago
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Answer:

The answer to your question is 0.269 g of Pb

Explanation:

Data

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Volume = 100 L

mass = 0.269 g

atomic mass Pb = 207.2 g

Chemical reaction

                        2Pb(s) + O₂(aq) + 4H⁺(aq) → 2H₂O(l) + 2Pb₂⁺(aq)

Process

1.- Calculate the mass of Pb in solution

Formula

Molarity = \frac{number of moles}{volume}

Solve for number of moles

Number of moles = Volume x Molarity

Substitution

Number of moles = 100 x 0.000013

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2.- Calculate the mass of Pb formed.

                       207.2 g of Pb ----------------- 1 mol

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                        x = (0.0013 x 207.2) / 1

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