AQA GCSE Chemistry Topic 4: Chemical Changes - Reactions of Acids Quiz

Acids produce ______ ions in aqueous solutions

Alkalis produce ______ ions in aqueous solutions

The pH scale measures the acidity or alkalinity of a solution, and can be measured using universal indicator or a pH ______

PH 7 is ______

PH 7 is ______

H+(aq) + OH-(aq) -> H2O(l) is the ionic equation of any ______ reaction

The charges on the positive ion from the base/alkali/carbonate and the negative ion from the acid must add up to ______

If you have sodium hydroxide and sulfuric acid, you have Na+ ions and SO4^2- ions, so you need 2x Na+ ions, giving you the salt: Na2______

The charges on the ions from acids are: Cl-, NO3-, and SO4^2- Soluble salts. They can be made from acids by reacting them with solid insoluble substances, such as metals, metal oxides, hydroxides, or ______

Add the chosen solid insoluble substance to the acid then the solid will ______

You know the acid has been neutralized when excess solid sinks to the bottom, so keep adding until this ______

Filter out excess solid leaving the salt solution, then evaporate some water, then leave the rest to evaporate ______

Acids react with some metals to produce a ______ and hydrogen

Redox reactions involve one substance being reduced and another substance being ______

In the reaction 2HCl + Mg -> MgCl2 + H2, magnesium is ______

Acids are neutralised by ______ to produce salts and water

Acids are neutralised by metal carbonates to produce salts, water, and ______

Use 25cm​3 pipette to add 25cm​3 of ______ into a conical flask, drawing alkali into the pipette using a pipette filler.

Hydrochloric acid produces ______ in alkali and base reactions

Nitric acid produces ______ in alkali and base reactions

Add a few drops of a suitable indicator to the conical flask (eg: phenolphthalein which is pink when alkaline and colourless when ______).

Sulfuric acid produces ______ in alkali and base reactions

Add acid from burette to alkali until end-point is reached (as shown by ______).

The titre (volume of acid needed to exactly neutralise the acid) is the difference between the first (100cm​3) and second readings on the ______.

Acids are neutralised by insoluble metal hydroxides and metal oxides to produce ______ and water

Acids are neutralised by metal carbonates to produce ______, water, and carbon dioxide

Repeat the experiment to gain more precise ______.

25 cm​3 of dilute hydrochloric acid is neutralised by 20 cm​3 of 0.5 mol/dm​3 sodium hydroxide. What is the concentration of the hydrochloric ______?

Convert volumes into ______.

Work out the moles of NaOH: moles = volume x ______.

Work out mole ratio from equation HCl + NaOH -> H2O + NaCl, 1:1 ratio, so moles of NaOH = moles of HCl, so moles of HCl = ______.

Work out concentration: conc = moles / vol = 0.01 / 0.025 = ______ mol dm-3.

Strong acid = completely ______ in aqueous solution.

Weaker an acid, ______ the pH (for a given conc. of aq. solutions).