WorksheetsChapter 6 Form 4
Total questions: 20
Worksheet time: 28mins
Halim said "Ph is the measure of concentration of hydrogen ions in aques solution". State the statements whether it is TRUE or FALSE.
TRUE
FALSE
The pH of lemon juice falls between 2 and 3, meaning it is
(a)
An acid HX with concentration 0.5 mol dm-3 hydrogen ions, H+ , calculate the pH value of HX
3
0.2
0.3
0.302
A NaOH solution has a concentration of 0.001 mol dm-3 and the pOH of the solution is 3.0. Explain what formula you use to solved this problem and how you solved it
If the pH of a solution is 4, choose the correct steps how to calculate the concentration of hydrogen ions H+
1) Use formula
pH=-log[H+] ,
2)insert the value
4=-log[H+]
3) Calculate the H
[H+]=10-4
4) [H+]=0.0001 mol/L
1) Use formula
pH=-log[OH+] ,
2)insert the value
4=-log[OH+]
3) Calculate the H
[OH+]=10-4
4) [OH+]=0.0002 mol/L
1) Use formula
pH=-log[H+] ,
2)insert the value
4=-log[H+]
3) Calculate the H
[H+]=10-4
4) [H+]=0.01 mol/L
Determine the molarity of alkali X with pH value 11.0
1x10-3 mol dm-3
1x10-2 mol dm-3
3 mol dm-3
1x10-4 mol dm-3
which of the following salt is prepared by double decomposition reaction (DDR)
KCl
AgNO3
CaCo3
NH2SO4
state the solubility of BaSO4
(a)
we can use 3 method in preparing the salt. state only 2 method
(a)
is (NH4)2C03 insoluble salt?
True
False
write the definition of neutralisation
diagram 9 shows the experiment to produce salt R
what salt solution can be used to replace Pb(NO3)2 solution to produce salt that has same solubility as salt R
Cu(NO3)2
Fe(NO3)2
Ca(NO3)2
Mg(NO3)2
which of the following can be prepared by titration method
K2CO3
AgCl
CaSO4
MgSO4
Which gas(es) is/are produced when nitrate salt is heated?
Nitrogen dioxide
Carbon dioxide
Oxygen
Nitrogen
Which of the gas (es) has pungent smell?
Hydrogen chloride gas, HCL
Ammonia gas, NH3
Sulphur dioxide gas, SO2
Nitrogen dioxide gas, NO2
Given are the salts that can decompose during heating. Except?
Zinc carbonate
Ammonium nitrate
Zinc sulphate
Sodium carbonate
Sulphur dioxide can change purple colour potassium manganate (vi) to (a)
What is the inteference for this reaction
White fume released
Hydrogen chloride gas released
Sulphur dioxide gas released
Nitrogen dioxide gas is released
Nitrate salts → metal oxide + ______ ___ + Nitrogen dioxide gas
(a)
Which of the following is colourless gas?
Chlorine
Ammonia
Hydrogen
Oxygen
