Podcast
Questions and Answers
Acids produce ______ ions in aqueous solutions
Acids produce ______ ions in aqueous solutions
H+
Alkalis produce ______ ions in aqueous solutions
Alkalis produce ______ ions in aqueous solutions
OH-
The pH scale measures the acidity or alkalinity of a solution, and can be measured using universal indicator or a pH ______
The pH scale measures the acidity or alkalinity of a solution, and can be measured using universal indicator or a pH ______
probe
PH 7 is ______
PH 7 is ______
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PH 7 is ______
PH 7 is ______
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H+(aq) + OH-(aq) -> H2O(l) is the ionic equation of any ______ reaction
H+(aq) + OH-(aq) -> H2O(l) is the ionic equation of any ______ reaction
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The charges on the positive ion from the base/alkali/carbonate and the negative ion from the acid must add up to ______
The charges on the positive ion from the base/alkali/carbonate and the negative ion from the acid must add up to ______
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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______
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______
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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 ______
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 ______
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Add the chosen solid insoluble substance to the acid then the solid will ______
Add the chosen solid insoluble substance to the acid then the solid will ______
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You know the acid has been neutralized when excess solid sinks to the bottom, so keep adding until this ______
You know the acid has been neutralized when excess solid sinks to the bottom, so keep adding until this ______
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Filter out excess solid leaving the salt solution, then evaporate some water, then leave the rest to evaporate ______
Filter out excess solid leaving the salt solution, then evaporate some water, then leave the rest to evaporate ______
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Acids react with some metals to produce a ______ and hydrogen
Acids react with some metals to produce a ______ and hydrogen
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Redox reactions involve one substance being reduced and another substance being ______
Redox reactions involve one substance being reduced and another substance being ______
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In the reaction 2HCl + Mg -> MgCl2 + H2, magnesium is ______
In the reaction 2HCl + Mg -> MgCl2 + H2, magnesium is ______
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Acids are neutralised by ______ to produce salts and water
Acids are neutralised by ______ to produce salts and water
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Acids are neutralised by metal carbonates to produce salts, water, and ______
Acids are neutralised by metal carbonates to produce salts, water, and ______
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Use 25cm3 pipette to add 25cm3 of ______ into a conical flask, drawing alkali into the pipette using a pipette filler.
Use 25cm3 pipette to add 25cm3 of ______ into a conical flask, drawing alkali into the pipette using a pipette filler.
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Hydrochloric acid produces ______ in alkali and base reactions
Hydrochloric acid produces ______ in alkali and base reactions
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Nitric acid produces ______ in alkali and base reactions
Nitric acid produces ______ in alkali and base reactions
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Add a few drops of a suitable indicator to the conical flask (eg: phenolphthalein which is pink when alkaline and colourless when ______).
Add a few drops of a suitable indicator to the conical flask (eg: phenolphthalein which is pink when alkaline and colourless when ______).
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Sulfuric acid produces ______ in alkali and base reactions
Sulfuric acid produces ______ in alkali and base reactions
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Add acid from burette to alkali until end-point is reached (as shown by ______).
Add acid from burette to alkali until end-point is reached (as shown by ______).
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The titre (volume of acid needed to exactly neutralise the acid) is the difference between the first (100cm3) and second readings on the ______.
The titre (volume of acid needed to exactly neutralise the acid) is the difference between the first (100cm3) and second readings on the ______.
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Acids are neutralised by insoluble metal hydroxides and metal oxides to produce ______ and water
Acids are neutralised by insoluble metal hydroxides and metal oxides to produce ______ and water
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Acids are neutralised by metal carbonates to produce ______, water, and carbon dioxide
Acids are neutralised by metal carbonates to produce ______, water, and carbon dioxide
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Repeat the experiment to gain more precise ______.
Repeat the experiment to gain more precise ______.
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25 cm3 of dilute hydrochloric acid is neutralised by 20 cm3 of 0.5 mol/dm3 sodium hydroxide. What is the concentration of the hydrochloric ______?
25 cm3 of dilute hydrochloric acid is neutralised by 20 cm3 of 0.5 mol/dm3 sodium hydroxide. What is the concentration of the hydrochloric ______?
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Convert volumes into ______.
Convert volumes into ______.
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Work out the moles of NaOH: moles = volume x ______.
Work out the moles of NaOH: moles = volume x ______.
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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 mole ratio from equation HCl + NaOH -> H2O + NaCl, 1:1 ratio, so moles of NaOH = moles of HCl, so moles of HCl = ______.
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Work out concentration: conc = moles / vol = 0.01 / 0.025 = ______ mol dm-3.
Work out concentration: conc = moles / vol = 0.01 / 0.025 = ______ mol dm-3.
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Strong acid = completely ______ in aqueous solution.
Strong acid = completely ______ in aqueous solution.
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Weaker an acid, ______ the pH (for a given conc. of aq. solutions).
Weaker an acid, ______ the pH (for a given conc. of aq. solutions).
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