Acids And Alkali Revision Flashcards
What would corrosive do to you?
Attacks and destroys living tissue including eyes and skin
What would irritant do to you?
It can make you ill if swallowed, breathed in to absorbed through the skin
Colour of litmus
Hydrochloric acid
Pink
Colour of Litmus
Sodium hydroxide
Blue
Colour of Litmus
Citric acid
Pink
Colour of Litmus
Potassium hydroxide
Blue
Colour of Litmus
Phosphoric acid
Pink
Colour of Litmus
in water
Stays the colour it started ( so red stays red and blue stays blue)
pH of Boric acid
Weak acid pH5
pH of sodium hydroxide
Strong alkali pH14
pH of sodium bicarbonate
Weak alkali pH 9
pH of distilled water
Neutral pH7
What is the pH range for acid?
PH less than 7
The smaller the number the more acidic
PH range for alkali
Over pH7
The higher the number the stronger the alkali
What is the pH of a neutral solution
Exactly pH 7
True or false
pH 7 means neutral
True
Hazard sign for toxic if swallowed
Skull and cross bones
Hazard sign for corrosive
Hand and something being spilt on it.
Hazard sign for irritant
A cross (current) Exclamation mark (previous hazard symbol)
Hazard sign for flammable?
A flame (old) A line with a flame on top (new)
Hazard sign for explosive?
Lines blowing up
Hazard sign for oxidising?
And meaning
Circle with a flame on top (old)
Line with circle with a flame on top (new)
Don’t mix with combustibles may intensify fire.
Hazard sign for damages the environment?
A dead tree and dead fish
What is the pH of water
7
UI colour for weak acid
Orange to orangey yellow as it gets closer to neutral
UI for weak alkali
Blue-green to turquoise as it gets more acid in it.
What formulae is Hydrochloric acid
HCl
What formulae is sulphuric acid
H2SO4
What formulae is Nitric acid
HNO3
What is HCl
Hydrochloric acid
What is H2SO4
Sulphuric acid
What is HNO3
Nitric acid
What formulae is sodium hydroxide
NaOH
What formulae is potassium hydroxide
KOH
What formulae is Calcium hydroxide
Ca(OH)2
What is NaOH
Sodium hydroxide
What is KOH
Potassium hydroxide
What is Ca(OH)2
Calcium hydroxide
UI colour for strong alkali
Purple
UI colour for neutral
Green
UI colour for strong acid
Red
