Acid and Alkalis Flashcards
(46 cards)
Acid
They have a pH of 1-6 and turn orange or red when tested with a indicator
Alkali
pH of 8-14 and turn blue or purple when tested with an indicator
Indicators
Indicators show if a solution is acid or alkali
Different indicators give different colours in acids and alkalis
We need to know the colours of the indicators in acid or alkali conditions
we need indicators to be able to identify if a substance is an acid, alkali or metal.
it also allows us to know if a person has an acidic or alkali solution
What happens when you add Phenolphthalein to Hydrochloric acid
it turns pink
What happens when you add Phenolphthalein to Sulphuric acid
it turns pink
What happens when you add Phenolphthalein to Nitric acid
it turns pink
What happens when you add phenolphthalein to water (control)
it turns to pink
What happens when you add Methyl Orange to Hydrochloric acid
it turns red
What happens when you add Methyl Orange to Sulphuric acid
it turns red
What happens when you add Methyl Orange to Nitric Acid
it turns red
What happens when you add Methyl Orange to water (control)
it turns orange
what happens when you add litmus to hydrochloric acid
it turns red
what happens when you add litmus to sulphuric acid
it turns red
what happens when you add litmus to nitric acid
it turns red
what happens when you add litmus to water (Control)
it turns purple
What happens when you add phenolphthalein to sodium hydroxide
it turns colourless
what happens when you add phenolphthalein to ammonium hydroxide
it turns colourless
what happens when you add methyl orange to sodium hydroxide
it turns yellow
what happens when you add methyl orange to ammonium hydroxide
it turns yellow
what happens when you add litmus to sodium hydroxide
it turns blue
what happens when you add litmus to ammonium hydroxide
it turns blue
skull and bones hazard sign
toxic - sign for toxic/poisonous substances and can cause severe damage when inhaled, absorbed, or swallowed
fish dead with tree behind hazard sign
environmental hazard - cause harm to the environment.
exclamation point hazard sign
general warning - It is a warning indicating the presence of hazardous materials in the lab.
