Acids And Alkalis Flashcards
When an acidic solution is put on red litmus paper what colour does it turn?
Red
When an acidic solution is put in blue litmus paper what colour does it turn?
Red
When an alkaline solution is put in red litmus paper what colour does it turn?
Blue
When an alkaline solution is put in blue litmus paper what colour does it turn?
Blue
When neutralising solution what is the general equation?
Acid + Alkali = Salt + Water
If a hazard symbol has an exclamation mark on it what does it mean?
Harmful/Caution
What hazard symbol causes blistering of the skin?
Corrosive
What do you wear when working with an acid labelled with a hazard symbol?
Goggles/Hair Tied Back/Lab Coat/Gloves
We dilute something when we add what to it?
Water
Adding water to dilute something makes it less what?
Concentrated
A strong acid has a hgih cponcentration of what?
Hydrogen
A strong Alkali has a high concentration of what?
Hydroxide
What acid does our stomachs produce?
Hydrochloric
Hydrochloric acid has a pH of what?
1
Why does hydrochloric have a pH of 1
To digest food and kill bacteria
When our stomachs produce too much acid what is it called?
Indegestion
Indegestion remedies are what?
Alkali which neutralise the excess acid
What is a base?
A substance that neutralises an acid – those that dissolve in water are called
alkalis.
What is an example of Alkaline solutions
Sodium hydroxide (used to make soap), potassium hydroxide, oven
cleaner, toothpaste, shampoo.
What is a scale from 1-14 which measures acidity and alkalinity?
pH scale
A substance which can be used to neutralise an acid?
Antacid
