Gravimetric and titration calculations -empirical, molecular and combustion analysis

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What is the primary assumption made when conducting a combustion analysis

All hydrogen is converted to water vapor.

In the given equation CxHy(s) + excess O2(g) ⟶ xCO2(g) + yH2O(g), what does 's' represent?

Solid state

What is the empirical formula derived for polyethylene

$CH_2$

What is the molar ratio of hydrogen to carbon in polyethylene?

<p>$2:1$</p> Signup and view all the answers

What is the purpose of using excess O2 in combustion analysis?

<p>To ensure complete combustion</p> Signup and view all the answers

Why is it not necessary to have a balanced chemical equation for deriving the empirical formula?

<p>The molar ratios are sufficient for formula derivation.</p> Signup and view all the answers

If a compound had a molar ratio of hydrogen to carbon as 3:1, what would its empirical formula be?

<p>$C_3H_6$</p> Signup and view all the answers

If a compound had an empirical formula of $C_4H_{10}$, what would its molecular formula be?

<p>$C_8H_{20}$</p> Signup and view all the answers

What is the primary assumption made when conducting a combustion analysis as described in the text?

<p>All the carbon in the sample combusted is converted to carbon dioxide.</p> Signup and view all the answers

In the given equation CxHy(s) + excess O2(g) ⟶ xCO2(g) + yH2O(g), what does 's' represent?

<p>Solid</p> Signup and view all the answers

What is the molar ratio of hydrogen to carbon in polystyrene, as mentioned in the text?

<p>2:1</p> Signup and view all the answers

What is the purpose of using excess O2 in combustion analysis?

<p>To prevent side reactions.</p> Signup and view all the answers

If a compound had an empirical formula of $CH_3$, what would its molecular formula be?

<p>$C_3H_9$</p> Signup and view all the answers

What is the molar ratio of hydrogen to carbon in polyethylene, as calculated in the text?

<p>$1:2$</p> Signup and view all the answers

If a compound had a molar ratio of hydrogen to carbon as 4:1, what would its empirical formula be?

<p>$C_2H_8$</p> Signup and view all the answers

What does the molar ratio of hydrogen to carbon determine in a compound?

<p>The chemical structure of the compound.</p> Signup and view all the answers

In combustion analysis, why is it not necessary to have a balanced chemical equation for deriving the empirical formula?

<p>Balancing equations does not affect the determination of empirical formulas.</p> Signup and view all the answers

Which component of a combustion analysis device is labeled as 'O subscript 2 and other gases' at the end of a tube?

<p>The exhaust outlet</p> Signup and view all the answers

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