EduNinja• State: bases are oxides or hydroxides of metals and that alkalis are soluble bases
A list of gases is shown.
ammonia
carbon dioxide
carbon monoxide
ethene
fluorine
oxygen
sulfur dioxide
xenon
Answer the following questions using only the gases from the list. Each gas may be used once, more than once or not at all.
Give the name of the gas that:
forms an alkaline solution when dissolved in water
Period 3 contains the elements sodium to argon. This question asks about the chemistry of each of the Period 3 elements or their compounds.
Magnesium reacts slowly with warm water to form a base, magnesium hydroxide.
Explain what is meant by the term base.
Ammonia is a weak base.
Explain the meaning of the term base.
Which row describes the reactions of magnesium hydroxide and magnesium oxide?
effect of heat on hydroxide
effect of heating oxide with carbon
forms magnesium oxide
magnesium and carbon dioxide formed
forms magnesium oxide
no reaction
no reaction
magnesium and carbon dioxide formed
no reaction
no reaction
Solid sodium hydroxide is a base which dissolves to form an aqueous solution, NaOH(aq).
State what is meant by the term base.
State the term given to a base which dissolves to form an aqueous solution.
This question is about acids, bases and alkalis.
Table 3.1 shows the pH values of some substances.
Table 3.1
State what is meant by the term alkali.
Barium carbonate, , is an insoluble solid.
When barium carbonate is heated strongly, it undergoes thermal decomposition. One of the products is barium oxide.
Suggest the pH of the solution formed when barium oxide is added to water.