1. Fill in the
a) metal hydroxide + acid →
b) metal carbonate + acid → salt + water +
c) metal + acid →
d) Mg + H2SO4 → MgSO4 +
e) CaCO3 + HCl → CaCl2 +
+ hydrogen
+
+ water
f) When we mix acid and water we always add
to
A learner wants to investigate the reaction between a strong acid and a strong base.
a) She puts hydrochloric acid in a beaker and uses universal indicator to test the pH.
Give a possible colour that the indicator will be.
b) She added sodium hydroxide with a dropper until the indicator turns green.
What does the green colour of the indicator mean?
c)
What happened in the beaker?
d) Write the balanced chemical equation for the reaction in the beaker.
e) The learner pours the product from the reaction into an evaporating basin.
She leaves the basin in a sunny spot for one week. What did the learner find in the basin
when she returned to the laboratory one week later?
6.
7.