How much? The amount of chemical change

(e) The propanoic acid obtained by the distillation was an aqueous solution with a volume of 22.5 $\mathrm{cm^3}$. Three 5.00 $\mathrm{cm^3}$ samples of this solution were titrated with 0.200 $\mathrm{mol\,dm^{-3}}$ $\ce{NaOH}$ to determine the accurate…

Which substances will be present in the reaction vessel at the end of the reaction between 1.5 g of magnesium and 50.0 cm3 of 1.0 mol dm⁻³ hydrochloric acid? $\ce{Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g)}$ A. $\ce{HCl(aq)}$, $\ce{MgCl2(aq)}$ B. $\ce{Mg(s)}$,…

(i) Suggest, giving a reason for each, two different safety precautions that should be taken when carrying out either of these preparations. (ii) Deduce the coefficients needed to balance the following equation for the reaction of silver with concentrated…

Gallium forms a sulfate of formula $\ce{Ga2(SO4)3}$. (i) Both ionic and covalent bonding are present in this compound. State which particles are held together by each type of bond. (ii) Contrast covalent and ionic bonds in terms of what happens to the valence…

For the runs with 0.40 and 0.80 $\mathrm{mol\,dm^{-3}}$ $\ce{HNO3(aq)}$, suggest which reactant, $\ce{CaCO3(s)}$ or $\ce{HNO3(aq)}$, was the limiting reagent. Give a reason for your answer.

If the reaction with 0.80 $\mathrm{mol\,dm^{-3}}$ $\ce{HNO3(aq)}$ went to completion, the theoretical mass of $\ce{CO2(g)}$ released would be 1.76 g. (i) Use the graph to determine the mass, in g, of $\ce{CO2(g)}$ actually released in this reaction. (ii)…

What volume of propane gas, in $\mathrm{cm^3}$, must be burned completely in oxygen to give 90 $\mathrm{cm^3}$ of carbon dioxide, all volumes being measured at the same temperature and pressure? $\ce{C3H8(g) + 5O2(g) -> 3CO2(g) + 4H2O(g)}$ A. 18 B. 30 C. 90 D.…

(i) Write a balanced equation, with state symbols, for this reaction. (ii) Deduce which of the two reactants runs out first, that is, which one limits the reaction. Use sections 1, 4 and 7 of the data booklet. (iii) Calculate the volume, in $\mathrm{dm^3}$,…

A chemist treated 22.99 g of galantamine with sulfuric acid to make the sulfate salt: $\ce{2C17H21NO3 + H2SO4 -> (C17H22NO3)2SO4}$ The mass of salt isolated was 24.65 g. Determine the percentage yield of the salt. Use section 7 of the data booklet.

90.0 $\mathrm{cm^3}$ of buta-1,3-diene and 150.0 $\mathrm{cm^3}$ of hydrogen are mixed in a container at 450 K and 101 kPa and react to form butane only. Determine the maximum volume of butane that can be formed, measured at the same temperature and pressure.