3.1 Acids Flashcards
In Aqueous solutions what ions do acids produce?
H+ ions
In Aqueous solutions what ions do Alkalis produce?
OH -
What colour does phenolphthalein go when the substance is alkaline?
Pink
What colour does Phenolphthalein go when a substance is acidic?
Colourless
If a substance is Alkaline what colour will methyl orange go?
Yellow
If a substance is acidic what colour will Methyl Orange go?
Red
If Litmus paper is blue is the substance acid or alkali?
Alkaline
If Litmus Paper is red is the substance acid or alkali?
Alkali
If the PH increases by 1 unit he concentration of H+ ions increases by a factor of what?
10
What does concentrated mean?
Larger amount of substance in a given volume of a solution
What does dilute mean?
Lesser amount of substance in a given volume of a substance
What is Dissociation?
Where the acid breaks down to release H+ ions in a solution
What does a strong acid fully do in aqueous solutions?
dissociates
What does a weak acid do in aqueous solutions?
Partially dissociate
Acid+Base=?
Salt +Water
Are acids or Alkalis soluble bases?
Alkalis
Acid+Metal=?
Salt + Hydrogen gas
Acid + Metal Oxide=?
Salt + Water
Acid+Metal Hydroxide=?
Salt + Water
Acid + Metal carbonate =?
Salt + Water + Carbon dioxide
What would you do to test for hydrogen?
Place a lit splint to the test tube and wait for a squeaky pop if hydrogen is present
What is the test for carbon dioxide?
Bubble the gas through the limewater and if CO2 is present the limewater will turn milky
For any neutralisation reaction with an acid and an alkali what is the equation?
H+(AQ)+OH-(AQ)=H20 (L)
If soluble salts are prepared from an acid and a soluble reactant why should titration be used?
Both reactants are liquid/soluble so if you had excess of one you would not be able to easily remove it from your mixture. This means you need to measure exact amounts and this can easily be done with Titration.
You would then have to mix the two reactants
