Acids and Bases Yr 8 Flashcards
What is the pH of a neutral solution?
pH7
What is the pH of a strong acid? What colour will universal indicator show if put into a strong acid?
pH 1-2, red
What is the pH of a strong alkali? What colour will universal indicator show if put into a strong alkali?
pH 12-14, purple
What colour will universal indicator show when in contact with a neutral solution?
green
Which is the element that is present in all acids?
hydrogen
Which is the ion that is present in all acids?
H+
Which is the ion that is present in all alkalis?
OH- (hydroxide)
What is the definition of an alkali?
It is a soluble base.
What is the definition of a base?
Something that will neutralise an acid to make a salt
Name two types of insoluble bases
oxides and carbonates
Complete the general word equation:
acid + base –>
salt + water
Complete the general word equation:
acid + oxide –>
salt + water
Complete the general word equation:
acid + alkali –>
salt + water
Complete the general word equation:
acid + carbonate –>
salt + water + carbon dioxide
Complete the general word equation:
acid + metal –>
salt + hydrogen
Complete the general symbol equation:
H+ + OH- –>
H2O (water)
Name this acid: H2SO4
sulphuric acid
Name this acid: HCl
hydrochloric acid
Name this acid: HNO3
nitric acid
Is this an oxide, hydroxide or carbonate?
NaOH
hydroxide
Is this an oxide, hydroxide or carbonate?
MgO
oxide
Is this an oxide, hydroxide or carbonate?
CaCO3
carbonate
