(a(i))[1]
Deduce the volume of hydrogen gas released after 2 minutes.
(a(ii))[2]
Draw a line on the grid in Fig. 8.1 to predict how the volume of hydrogen gas changes when dilute hydrochloric acid of a higher concentration is used.
(b(i))[1]
Describe how the rate of reaction differs when large pieces of iron are used.
(b(ii))[1]
Describe how the rate of reaction differs when a temperature of 15 ^{\circ}C is used.
(c(i))[2]
Complete the word equation for this reaction.\n\nhydrochloric acid + sodium hydroxide → [BLANK] + [BLANK]
(c(ii))[1]
Write the formula of the ion found in all acids.
(c(iii))[1]
Select from the list one possible pH value of aqueous sodium hydroxide.\n\npH 2 pH 4 pH 7 pH 13
(c(iv))[1]
State the colour of methyl orange in aqueous sodium hydroxide.