Acids And Bases Flashcards
(20 cards)
Bases
Indigestion tablets Soap Shampoo Toothpaste Window cleaner Bread soda
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
Acids
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
Neutral
If something is neither an acid nor a base, and has a pH of 7 then it is neutral
Alkali
A base that dissolves In water is called alkali e.g drain cleaner (sodium hydroxide)
Neutralisation
If an acid and base are mixed together in the right concentrations, then they neutralise each other.
A 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 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 a titration.
The products of the titration
Salt and water
Indicator paper
An indicator changed colour to tell us if something is an acid or 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
This changes different colours for different pH values, it is compared to the key on the pack
Datalogging
This is where you used 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
