Acids, Alkalis And Salts Flashcards
What number range and colour on the PH scale is an acid
1-6, red
What colour and number is neutral on the PH scale
7, green
What colour is the indicator phenolphthalein in acid and alkali
Acid = Colourless
Alkaline = pink
What number range and colour is Alkali on the PH scale
Purple, 8-14
What indicator is Red in acid and yellow in alkaline solutions
Methyl orange
What colour does litmus paper go in acidic solutions and alkaline solutions
Acidic = red
Alkaline = blue
What is a base
A chemical that neutralises acids producing salt and water
What are the steps to carrying out a titration
1: using a PIPETTE transfer (25cm3) of ALKALI to a conical flask
2: Add some drops of any indicator to the same conical flask
3: fill a BURETTE with some acid
4: Add the ACID to the ALKALI slowly and swirl the comical flask after each drop
5: once you start to notice a colour change , add the acid slowly.
6: once the alkali has been NEUTRALISED, read the burette from the BOTTOM of the MENISCUS
7: Repeat the titration and calculate a mean
Are sodium, potassium and ammonium salts soluble or insoluble
Soluble
Are nitrates soluble or insoluble
Soluble
Are chlorides soluble or insoluble
Soluble
Except for: SILVER chloride and LEAD chloride
Are sulphates soluble or insoluble
Soluble
Except for: LEAD sulphate, BARIUM sulphate and CALCIUM sulphate
Are carbohydrates soluble or insoluble
Insoluble
Except for SODIUM carbonate, POTASSIUM carbonate and AMMONIUM carbonate
Are hydroxides soluble or insoluble
Insoluble
Except for SODIUM hydroxide, POTASSIUM hydroxide and CALCIUM hydroxide
What is the equation for neutralisation
H + OH -> H2O
