Describe a chemical test that can be used to show that the colourless liquid collected in the boiling tube is water.
Suggest why the boiling tube is put into a beaker of ice.
What happens to the limewater in the conical flask when carbon dioxide is bubbled through it?
Use the information shown in the diagram to fill in the results table.
Calculate the number of moles of $\text{HCl}$ in the mean volume of $1.00\text{ mol dm}^{-3}$ $\text{HCl}$.
Use the equation and your answer to (ii) to work out the number of moles of sodium hydroxide, $\text{NaOH}$, in $25.0\text{ cm}^3$ of Q. $\text{NaOH} + \text{HCl} \rightarrow \text{NaCl} + \text{H}_2\text{O}$
Calculate the number of moles of $\text{NaOH}$ in $100\text{ cm}^3$ of Q.
Calculate the number of moles of $\text{NaOH}$ in the original $100\text{ cm}^3$ of $2.00\text{ mol dm}^{-3}$ $\text{NaOH}$.
Use your answers to (iv) and (v) to determine the number of moles of $\text{NaOH}$ that reacted with the carbon dioxide made when the hydrocarbon was burnt.
Use the equation and your answer to (vi) to determine the number of moles of carbon dioxide produced by burning the hydrocarbon. $\text{CO}_2 + 2\text{NaOH} \rightarrow \text{Na}_2\text{CO}_3 + \text{H}_2\text{O}$
The mass of hydrocarbon burnt is $0.73\text{ g}$. The $M_r$ of the hydrocarbon is $86$. Calculate the number of moles of hydrocarbon burnt.
This hydrocarbon is an alkane. The general formula of alkanes is $C_nH_{2n+2}$. Use your answers to (vii) and (viii) to calculate the value of $n$ in this hydrocarbon.