Grade : 9
PRACTICAL:
PHYSICAL SCIENCE
Properties of acids
Date : …………………………..
Name : …………………………………………………
Set:
……………………
Apparatus and Chemicals required:
Bunsen burner
test tubes
boiling tube
delivery tube
evaporating dish
conical flask
tripod stand
filter paper
funnel
droppers x 6
safety spectacles
lab coat
spatula
wire gauze
hydrochloric acid HCl
ethanoic acid CH3COOH
sulphuric acid H2SO4
nitric aid HNO3
sodium hydroxide NaOH
blue litmus paper
copper pieces Cu
magnesium ribbon Mg
marble chips CaCO3
copper (II) oxide CuO
universal indicator solution
1.
Dilute a little ethanoic acid in a test tube. Dip your finger into the ethanoic acid and taste it.
Record the taste.
2.
Pour some hydrochloric acid into a test tube (about 1 cm3). Dip a piece of blue litmus paper
into the hydrochloric acid. Record what you see.
3.
Place about 3cm of magnesium ribbon into a test-tube and add about 4cm3 hydrochloric
acid. Collect any gas produced in an inverted test-tube. Record your observations.
Test the collected gas with a lighted match. Record what happens and make a conclusion.
Pour resulting solution into an evaporating dish. Place the dish on the wire gauze and drive
off the water using a Bunsen flame. Record what you see. What do you think the residue is?
Write a word equation followed by a formulae equation for the reaction between magnesium
and hydrochloric acid.
Now add a piece of copper to a little hydrochloric acid in a test tube. What appears to
happen?
4.
Place a few marble chips, CaCO3, in a test-tube and add about 5cm3 of HNO3 ( nitric acid ).
What do you observe?
Now connect a delivery tube and bubble any gas given off through limewater Ca(OH)2.
Record what you see.
Write the formulae equation for the reaction below:.
calcium carbonate + nitric acid  calcium nitrate + water + carbon dioxide
5.
Place a spatula load of copper (II) oxide in a boiling tube and add sulphuric acid to a height
of about 3cm. Carefully boil the contents for 2 minutes then filter this mixture. Retain the
filtrate. What do you observe?
Write a word equation for this reaction:
6.
CuO + H2SO4  CuSO4 + H2O
Pour about 3cm3 of hydrochloric acid into a test tube and a few drops of universal indicator.
Now use sodium hydroxide solution to change the colour to yellow.
Write the word equation for the reaction.
HCl + NaOH  NaCl + H2O