Sour Power
Just a pinch of ......
What holds it all together
What a reaction!
Holey Moley
100
Name 3 metals that an acid will not react with.
copper , silver, gold, platinum
100
Name the method used to make ammonium nitrate using ammonium hydroxide and nitric acid.
Titration
100
Name the type/s of bonding present in barium chloride.
Ionic bonding
100
Zinc reacts with copper (II) chloride to form zinc (II) chloride and copper.
Name the type of reaction that takes place.
Displacement reaction
100
What is the number of moles of 151.2 dm3 of any gas at r.t.p.?
6.3 mol
200
Compare the concentration of H+ ions in 0.100 mol/dm3 of HCl and 0.100 mol/m3 of H2SO4.
Which is true?
A. They are equal.
B. The concentration is higher in HCl.
C. The concentration is higher in H2SO4.
C
H2SO4 is a dibasic acid and HCl is a monobasic acid.
H2SO4 releases twice the number of H+ ions in water per molecule as HCl.
200
Name two salts that are prepared by precipitation.
silver chloride, lead (II) chloride
calcium sulfate, lead (II) sulfate, barium sulfate
200
Name the type/s of bonding present in ammonium sulfate.
Ionic bonding & covalent bonding
(Covalent bonding within the polyatomic ions, NH4+ and SO42-. Ionic bonding between the cations and anions.)
200
The reaction between hydrochloric acid and sodium carbonate can be represented by the following equation:
2HCl + Na2CO3 -> 2NaCl + H2O + CO2
Write an ionic equation for this reaction (remember to include state symbols).
2H+ (aq) + CO32- (aq) -> H2O (l) + CO2 (g)
200
Calculate the number of moles in 18.9 cm3 of 0.150 mol/dm3 ammonium carbonate solution.
0.0002835 mol
(2.835 x 10-3 mol)
300
Name three substances that will react with nitric acid to form calcium nitrate.
calcium, calcium oxide, calcium hydroxide, calcium carbonate
300
A sample of pure magnesium sulfate is to be prepared.
i. Write a balanced chemical equation for a reaction that can be used
ii. Name the method used
i. Mg + H2SO4 -> MgSO4 + H2
MgO + H2SO4 -> MgSO4 + H2O
Mg(OH)2 + H2SO4 -> MgSO4 + 2H2O
MgCO3 + H2SO4 -> MgSO4 + H2O +CO2
ii. Add excess solid to acid
300
Draw a dot-and-cross diagram to show the bonding in one molecule of ammonia (show only outermost electrons).
300
A pure sample of calcium sulfate is to be prepared.
i. Write a balanced chemical equation for a reaction that can be used.
ii. State briefly the steps used to prepare a pure, dry sample of the salt.
i. Ca(NO3)2 + H2SO4 -> CaSO4 + 2HNO3
ii. Add the aqueous reactants together, filter the mixture, wash and dry the residue
300
What volume of 0.200 mol/dm3 hydrochloric acid is needed to exactly neutralise 25.0 cm3 of 0.120 mol/m3 of sodium hydroxide solution?
15 cm3