Acids And Bases Flashcards
(20 cards)
Bases
Indigestion tablets, Soap, Shampoo, Bread soda, Toothpaste and Window Cleaner
Bases in the lab
Sodium Hydroxide - NaOH
Limewater - (OH)2
Acids
Lemons, Vinegar, Vit C, Grapes, Rhubarb, Fizzy Drinks, Tea and 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 eg 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. a salt and water are produced
Indigestion
Excess stomach acid, take an antacid (anti-acid) which is a base
A Bee Sting
A bee sting is acidic: Rubbing a base e.g. bread side 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)
The products of the titration
Salt and water
Indicator paper
An indicator changes colour to tell us if something is an Acid or a Base
Litmus paper (blue)
Acid turns blue litmus paper red
Litmus paper (red)
Bases turn litmus paper blue
Universal indicator paper
This changes different colours for different pH values, it 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
Acids in the lab
Hydrochloric Acid - Also found in the stomach
Sulphuric Acid - Also found in car batteries
