Metals Acids And Ph Flashcards
Define concentration
How much substance there is in a give volume
What would it be called if there were few particles in a given volume
Dilute
If acids and alkalis are more concentrated what would that mean?
They are stronger than if they were dilute
What colour would a very acidic liquid be?
Red
What colour would a very alkali liquid be
Purple
What colour would a neutral liquid be?
Green
What numbers does the ph scale go up to
1 - 14
What numbers are 1-6
Acidic
What numbers are 8 - 14
Alkali
What are indicators?
Used to measure how acid or alkali a substance is
What is the universal indicator?
A different colour for each Ph
What is the litmus indicator?
Blue is Alkali
Red is Acidic
What are some examples of strong acids? (3)
- hydrochloric
- sulphuric
- Nitric
What are some examples of weak acids? (3)
- Citric acids
- Acetic
- Formic
What are some examples of strong alkalis? (2)
- sodium hydroxide
- ammonia
What are some examples of weak alkalis (2)
- milk of magnesia
- Calcium carbonate
Are alkalis and acids soluable or Insoluble?
Alkalis are soluble
Acids are insoluble
What does corrosive mean?
They can destroy skin and dissolve material (strong or concentrated)
What does irritant mean ?
They may burn skin and cause blisters (weak or dilute)
When does neutralisation occur?
When an acid and an alkali are mixed together
What is the equation for neutralisation
Acid + base ~> Salt + water
How are salts named?
After the metal, and the acid
What does ph does stomach have
About 1
How is indigestion/heartburn occur?
If the stomach acid moves up the digestive tract
What are antacids?
Medicines that contain bases that can neutralise stomach acids
What type of base do you want to counteract the strong stomach acids
Weaker because you still want some acid
What are two examples bases in antacid medicines
- magnesium hydroxide
- Calcium carbonate
