Atomic Structure
Ionic Formulae
Neutralisation
Rates of Reaction
Extra
100
What is the number of electrons in the outer shell of Carbon?
4
100
What is the formula of calcium nitrate?
Ca(NO3)2
100
All metal oxides and hydroxides are bases? True or False
True
100
Name 4 things which will change the rate of a reaction
temperature, surface area, concentration, catalyst
100
Which has more mass - Cl35 or Cl37?
Cl37
200
What is the electron arrangement of the Sulfide ion?
2,8,8
200
What is the name and formula of the salt made when sulfuric acid and magnesium hydroxide react?
magnesium sulfate, MgSO4
200
What is the colour of pH paper in a weak acid?
orange or yellow
200
Which reaction will go to completion fastest - 20 mL 0.01 molL-1 HCl with Mg strip or 2 mL 0.1 molL-1 HCl with Mg strip?
2mL of 0.1 molL-1 acid
300
How many electrons does Aluminium lose to bocome the Aluminium ion, and what is the charge on the ion?
3, 3+
300
Write the symbol equation for sodium carbonate reacting with hydrochloric acid.
Na2CO3 + 2HCl ---------> 2NaCl + H20 + CO2
300
What would you observe when sulfuric acid reacts with solid magnesium oxide? name the products
White solid disappears, colourless solution, magnesium sulfate and water
300
2 different concentrations of acid were reacted with sodium carbonate and the amount of gas measured over 20 mins. Both reactions produced the same amount of gas but reaction A did it in 5 mins rather than 20 mins. The reactions were done at room temperature explain in terms of reaction rates.
Acid A must be much more concentrated than B because the gas is produced much faster but the same amount of gas means the amount of carbonate was limited.
400
What do the oxide ion, the Magnesium ion and Neon all have in common?
They all have electron configuration 2,8
400
Write the equation for the reaction between calcium hydroxide and nitric acid
Ca(OH)2 + 2HNO3 -------> Ca(NO3)2 + 2H2O
400
Name the type of neutralisation reaction that produces a gas. What type of compound is the starting material?
acid and carbonate reaction, always a metal carbonate or hydrogen carbonate
400
Explain using collision theory why heating a reaction will speed it up.
Hotter = more Average KE so particles move faster. Therefore they collide more often and with more force. so there are more effective collisions producing products.
400
Explain why Gp1 metals have to be stored in oil but Gp 2 metals do not
Only 1 electron to lose from outer shell so easier.
500
What do Cl35 and Cl37 have in common, and how are they different?
Both have 17 protons but Cl35 has 18 neutrons and Cl37 has 20 neutrons.
500
A green solid and a clear liquid react together to form a blue solution and a gas. Name all compounds and write a balanced equation
Copper carbonate and sulfuric or hydrochloric acid copper sulfate or chloride and carbon dioxide and water CuCO3 + 2HCl --------> CuCl2 + CO2 +H2O or CuCO3 + H2SO4 --------> CuSO4 + CO2 +H2O
500
A white powder was spilled on the bench. To identify the powder a student added water and acid.They also had pH paper. The powder was identified to be magnesium hydroxide. Describe the steps and observations made to come to this conclusion.
put small sample in water - does not dissolve. Small sample rubbed on wet Universal pH paper - paper goes blue. Sample in acid disappears, no fizzing
500
describe in terms of collision theory why changing the concentration changes the rate of a reaction
Key idea = number of particles in a given volume
500
Write the balanced equation for the reaction between iron (111) carbonate and sulfuric acid
Fe2(CO3)3 + 3H2SO4 ----> Fe2(SO4)3 + 3CO2 + 3H2O
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