Acids and Bases (Chem) Flashcards
What is an acid?
An acid is a substance, a proton donor, that produces hydrogen ions when dissolved in water
Hydrochloric acid formula:
HCL
Nitric acid formula:
HNO3
Sulfuric acid formula
H2SO4
Ethanoic acid formula
CH3COOH
Properties of acids:
- sour taste
- conduct electricity (due to the mobile ions produced when dissolved in water)
- turn blue litmus paper red
acid + metal –>
salt + hydrogen
acid + base –>
Salt + water
acid + carbonate –>
salt + water + carbon dioxide
Difference between strong/weak acids
- strong acids ionise completely in aqueous solutions
- weak acids ionise partially in aqueous solutions
What does it mean by “strength of acid”
refers to the extent of ionisation of the acid in aqueous solution.
(The smaller the extent of ionisation, the weaker the acid)
What is an alkali?
It is a soluble base that produces hydroxide ions when dissolved in water
Properties of alkalis:
- bitter taste
- feel soapy
- conduct electricity (due to the mobile ions produced when they dissolve in water)
- turn red litmus paper blue
alkali + acid –>
salt + water
what is the reaction between alkali and acid called?
Neutralisation