Concentration and moles questions
1 A 1 mol dm-3
solution is one which contains: Choose
one:
a)
1 molecule of hydrogen per cm3 of solution.
b)
1 molecule of hydrogen per dm3 of water.
c)
1 mole of solute in 1 dm3 of solvent.
d)
1 mole of solute in 1 dm3 of solution.
e)
1 mole of solute in 1 cm3 of solution.
2) How many moles of the solute is in following
solutions?
a)
1000cm3 of 0.1 Mol dm-3 silver
nitrate solution. 0.100 Moles
b)
250cm3 of 0.1 Mol dm-3
potassium dichromate solution. 0.0250 Moles
c)
250cm3 of 0.1 Mol dm-3 sodium
chloride solution. 0.0250 Moles
d)
10cm3 of 2 Mol dm-3 sodium
chloride solution. 0.0200 Moles
e)
12.2cm3 of 1.56 Mol dm-3 nitric
acid. 0.0190 Moles
f)
12.2cm3 of 1.56 Mol dm-3
sulphuric acid. 0.0190 Moles
3) What is the Concentration of :
a)
1 mole of AgNO3 in 1000cm3 of solution? 1.00 Mol dm-3
b)
2 moles of AgNO3 in 250 cm3 of solution? 8.00 Mol dm-3
c) 0.5
moles of NaCl in 250 cm3 of
Solution? 2.00 Mol dm-3
d)
6 moles of KMnO4 in 2 dm3 of solution? 3.00 Mol dm-3
e)
4 moles of Na2S2O3.5H2O in 250 cm3
of solution? 16.0 Mol dm-3
f) 2
moles of CuSO4.5H2O in 250 cm3 of
solution? 8.00 Mol dm-3
4) What is the concentration of :
a)
1.7g of AgNO3 in 1000cm3 of
solution? 0.0100 Mol dm-3
b)
0.425g of AgNO3 in 250 cm3 of solution?
0.0100 Mol dm-3
c)
5.85g of NaCl in 250 cm3 of
Solution? 0.400 Mol dm-3
d)
3.16g of KMnO4 in 2 dm3 of solution? 0.0100
Mol dm-3
e)
6.2g of Na2S2O3.5H2O in 250 cm3
of solution? 0.100 Mol dm-3
f)
5.62g of CuSO4.5H2O in 250 cm3 of
solution? 0.0900M
5) What mass of each of the following is dissolved
in 250 cm3 of 0.1M solution? (2dp)
a) AgNO3
b) HCI
c) H2SO4
d) Sodium hydroxide
e) potassium manganate (VII)
4.25g
0.910g
2.45g
1.00g
3.95g