1999645
Description
Mind Map by Tom Johnson, updated more than 1 year ago
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Created by Tom Johnson
about 9 years ago
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Acids & Alkalis
- The pH Scale
- Used to measure how
acidic or alkaline a
solution is
- The strongest acid has a pH of 0
- The strongest alkali has a pH of 14
- A neutral substance (eg. water) has a pH of 7
- Used to measure how
acidic or alkaline a
solution is
- Indicator Dye
- The dye in an indicator solution
changes colour depending on whether
it's above or below a certain pH.
- Universal Indicator is a
combination of dyes that
produce the colours in
the diagram to the right
depending on the pH of a
solution
- It's very useful for estimating
the pH of a solution
- It's very useful for estimating
the pH of a solution
- The dye in an indicator solution
changes colour depending on whether
it's above or below a certain pH.
- Acids & Bases
- Acids & Bases neutralise each other
- An ACID is a substance with a pH of LESS than 7
- Acids for H+ ions in water
- Acids for H+ ions in water
- A BASE is a substance with a pH GREATER than 7
- An ALKALI is a base that DISSOLVES in water
- Alkalis form OH- ions in water
- Alkalis form OH- ions in water
- An ALKALI is a base that DISSOLVES in water
- H+ ions make solutions acidic
- OH- ions make solutions alkaline
- OH- ions make solutions alkaline
- Acids & Bases neutralise each other
- The reaction between acids and
bases is called neutralisation
- acid + base -> salt + water
- H+ + OH- -> H2O
- H2O (Water) has a neutral pH
so this shows that an acid and
bases neutralise each other
- H2O (Water) has a neutral pH
so this shows that an acid and
bases neutralise each other
- acid + base -> salt + water
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