Concentration vs Strength of acids
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What is concentration
The amount of substance dissolved in a given volume
What do all acids contain
H+ ions
Why do we call Ph 0-1 concentrated acids
They have a high amount of acid molecules in a given volume
Why do we call Ph 5-6 dilute acids
They have a low amount of acid molecules in a given volume
What is Ph
pH is the measure of the concentration of hydrogen ions (H+)
What do ph numbers mean
ph1= a concentration of H+ ions of 10-1 ph2=a concentration of H+ ions of 10-2 ph3=a concentration of H+ ions of 10-3 And so on
Strength of acids
The strength of an acid depends on how much the acid ionises the water. Stronger acids are fully ionised whereas weaker acids are partially ionised
What happens to acids when they are dissolved in water
In aqueous solutions, acid molecules ionise (split) and release h+ ions
Examples of strong acids
Hydrochloric acid Nitric acid Sulphuric acid
Examples of weak acids
Ethanoic acid Citric acid Carbonic acid
What are alkalis
Alkalis are ionic compounds made from metal (positive) and hydroxide(OH-) ions. When they dissolve they ionise to form OH- ions