Self assessment
Question 1 of 8
When an acid is added to a flask containing an alkali, what will happen to the pH of the solution in the flask?
A
pH will decrease.
B
pH will not change.
C
pH will increase.
D
Can't tell.
What are the products of the reaction between an acid and a base?
A
A salt and hydrogen.
B
A salt only.
C
A salt + water.
D
A salt + water + carbon dioxide.
Which of the following does NOT react to produce a salt?
A
Copper carbonate and dilute sulfuric acid.
B
Copper oxide and sulfuric acid.
C
Copper and dilute sulfuric acid.
D
Copper carbonate and hydrochloric acid.
Sodium sulfate can be prepared from which of the following pairs of reagents?
A
Nitric acid and sulfuric acid.
B
Nitric acid and sodium carbonate.
C
Sulfuric acid and magnesium oxide.
D
Sulfuric acid and sodium hydroxide.
An alkali and an acid can react to produce which of the following compounds?
A
Copper chloride.
B
Sodium hydroxide.
C
Hydrogen chloride.
D
Carbon dioxide.
A tub of 'flying saucer' type sweets lists the ingredients as 'sugar, maize starch, tartaric acid, sodium bicarbonate (NaHCO3), colouring'. Which pair of ingredients is likely to be responsible for the tingling fizz sensation of the sweets?
A
Maize, sugar.
B
Tartaric acid, sodium bicarbonate.
C
Tartaric acid, sugar.
D
Sodium bicarbonate, sugar.
In the following reaction, identify the spectator ions:
HNO3 + Ca(OH)2 Ca(NO3)2 + H2O
A
H+ and OH–
B
H+ and NO3–
C
NO3– and Ca2+
D
Ca2+ and OH–
A solution of 100 cm3 of 1.0 mol dm–3 sodium hydroxide is mixed with a solution of 100 cm3 of 1.0 mol dm–3 hydrochloric acid initially at the same temperature, in an insulated vessel. What will happen to the temperature?
A
It will decrease.
B
It will stay the same.
C
It will increase.
D
It's impossible to tell.