Study Chemistry revision pack on Acids, bases and salts for IGCSE. Useful for revision, homework, and exam preparation in Zimbabwe.
A free account is needed to download. Sign in or create one
This is the Cambridge International Examinations IGCSE Chemistry revision pack. It is a free revision pack for revision.
28
Acids, bases and salts
CORE questions
Core 1
(d) The equations A, B, C and D show some reactions of acids.
A $\mathrm{Mg}(\mathrm{OH})_{2}+2 \mathrm{HCl} \rightarrow \mathrm{MgCl}_{2}+2 \mathrm{H}_{2} \mathrm{O}$
B $\mathrm{Fe}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow \mathrm{FeSO}_{4}+\mathrm{H}_{2}$
C $\mathrm{CaCO}_{3}+2 \mathrm{HNO}_{3} \rightarrow \mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2}+\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O}$
D $\mathrm{CaO}+2 \mathrm{HCl} \rightarrow \mathrm{CaCl}_{2}+\mathrm{H}_{2} \mathrm{O}$
Answer the following questions by choosing from equations $\mathbf{A}, \mathbf{B}, \mathbf{C}$ or $\mathbf{D}$.
You may use each letter once, more than once or not at all.
(i) Which reaction produces an explosive gas? □
(ii) Which reaction forms a sulphate? □
(iii) Which reaction gives off a gas which turns lime water cloudy? □
(iv) Which is a reaction between a hydroxide and an acid? □
(v) Which reaction involves a transition element? □
[5]
(e) Describe how crystals of sodium chloride can be made in the laboratory from hydrochloric acid and aqueous sodium hydroxide.
$\_\_\_\_$
$\_\_\_\_$
$\_\_\_\_$
[3]
v1 4Y11
Cambridge IGCSE Chemistry - past and specimen paper questions and answers