Acids And Bases Flashcards
(20 cards)
Bases
Indigestion tablets, toothpaste, soap, shampoo, bread soda, window cleaner.
Acids in the lab
Hydrochloric acid-also found in the stomach
Sulphuric acid- also found in car batteries
Bases in the lab
Sodium hydroxide -NaOH
Limewater- Ca(OH)2
Acid
Lemons, vinegar, vitamin C, grapes, rhubarb, fizzy drinks, tea, apples.
pH
We can tell how acidic or basic a substance is by measuring something called pH.
Alkali
A base that dissolves in water is called an alkali
E.g.Drain cleaner (sodium hydroxide)
Neutral
If something is neither an acid nor a base, and has a pH of 7, then it is neutral.
Neutralisation
If an acid and base are mixed together in the right concentrations, then they neutralise each other.
Salt and water are produced.
Indigestion
Excess stomach acid, take an antacid (anti-acid) which is a base
A bee sting
Is acidic : rubbing a base e.g. Bread soda or soap will neutralise it
A wasp sting
Is alkaline: this needs to be treated with an acid e.g. Vinegar
Titration
An experiment to neutralise an acid (hydrochloric acid) with a base (sodium hydroxide) is called titration.
The products of the titration
Salt and water.
Indicator paper
Changes colour to tell us if something is an acid or s base
E.g. Litmus is a dye on indicator paper.
Acids turn blue litmus paper
Red
Bases turn red litmus paper
Blue
Universal indicator paper
Thos changes different colours for different pH values, its compared to the key on the pack.
Datalogging
This is where you use a pH sensor connected to a computer to measure pH.
Test for hydrogen
Lit splint will pop
Test for carbon dioxide
Limewater will turn milky
