IB Chemistry Topic R2.1 How Much? the Amount of…

Zinc reacts with dilute sulfuric acid according to the following equation:

$Z n (s) + H_{2} S O_{4} (a q) \to Z n S O_{4} (a q) + H_{2} ($

the limiting reactant in this reaction.

the volume of hydrogen gas produced at STP.

If the experiment yields 85% of the expected hydrogen gas, the actual volume collected.

Bromoethane is produced by: $\text{C}_2\text{H}_6 + \text{Br}_2 \rightarrow \text{C}_2\text{H}_5\text{Br} + \text{HBr}$

What is the atom economy for the production of bromoethane?

A gaseous hydrocarbon is found to have an empirical formula of $CH_2$ . At standard temperature and pressure (STP), the density of this gas is $1.85\text{ g dm}^{-3}$ .

the molar mass of the hydrocarbon and its molecular formula, using $22.7\text{ dm}^3\text{ mol}^{-1}$ as the molar volume of an ideal gas at STP.

Silver metal can be recovered from a solution of silver nitrate by a displacement reaction with copper.

Bioethanol, $\text{C}_2\text{H}_5\text{OH}$ , is burned in a car engine according to $\text{C}_2\text{H}_5\text{OH}(l) + \text{3O}_2(g) \rightarrow \text{2CO}_2(g) + \text{3H}_2\text{O}(l)$ The following standard enthalpies of formation are provided.

the standard enthalpy of combustion of ethanol using the formation data.

A particular journey requires $2.50 \times 10^{4}\ \text{kJ}$ of energy. the mass of ${CO}_{}$ released when this energy is supplied by burning ethanol.

A student recorded the following burette readings during a titration:

Initial volume: $5.00 \pm 0.05 \, \mathrm{cm^3}$

Final volume: $15.00 \pm 0.05 \, \mathrm{cm^3}$

What is the percentage uncertainty in the volume of solution delivered?

, in terms of the carbon cycle, why the $\text{CO}_2$ released by burning this bioethanol adds less to atmospheric $\text{CO}_2$ than the same mass released from petrol.

$\text{C}_2\text{H}_5\text{OH}(l)$	$-278$
$\text{CO}_2(g)$	$-394$
$\text{H}_2\text{O}(l)$	$-286$

IB Chemistry R2.1 How Much? the Amount of Chemical Change Questionbank

IB Chemistry R2.1 How Much? the Amount of Chemical Change Questionbank

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IB Chemistry R2.1 How Much? the Amount of Chemical Change Questionbank

IB Chemistry R2.1 How Much? the Amount of Chemical Change Questionbank

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IB Chemistry Topic R2.1 How Much? the Amount of Chemical Change Questionbank