Edexcel (9-1) Topic 3

The higher the concentration of hydrogen ions in an acidic solution, the lower the pH

As hydrogen ion concentration in a solution increases by a factor of 10, the pH of the solution decreases by [blank_start]1[blank_end]

Complete the diagram to show the different colours indicators turn for these different solutions. Two have been completed for you.

A positive test for hydrogen gas would be to bubble it through limewater, and it turn cloudy/milky.

Which of the following salts are soluble?

electrolysis of copper chloride solution will form: [blank_start]copper[blank_end] at the cathode [blank_start]chlorine[blank_end] at the anode electrolysis of sodium chloride solution will form: [blank_start]sodium[blank_end] at the cathode [blank_start]chlorine[blank_end] at the anode electrolysis of sodium sulfate solution will form: [blank_start]sodium[blank_end] at the cathode [blank_start]oxygen[blank_end] at the anode electrolysis of water acidified with sulfuric acid will form: [blank_start]hydrogen[blank_end] at the cathode [blank_start]oxygen[blank_end] at the anode electrolysis of lead bromide will form: [blank_start]lead[blank_end] at the cathode [blank_start]bromine[blank_end] at the anode

sodium + [blank_start]hydrochloric[blank_end] acid → [blank_start]sodium[blank_end] chloride + water [blank_start]copper[blank_end] oxide + sulfuric acid → copper [blank_start]sulfate[blank_end] + water [blank_start]potassium[blank_end] hydroxide+ [blank_start]nitric[blank_end] acid → potassium nitrate + water [blank_start]magnesium[blank_end] carbonate + hydrochloric acid → magnesium [blank_start]chloride[blank_end] + water + [blank_start]carbon dioxide[blank_end]

When making a soluble salt from an acid and insoluble reactants: excess of the reactant (a metal, metal oxide, or metal carbonate) is added to make sure all of the insoluble reactant reacts

When completing a titration, you need to work out a mean titre, and you must only include results that are concordant in your calculation.

most common sulfates (apart from lead sulfate, barium sulfate, calcium sulfate) are soluble

sulfuric acid + calcium [blank_start]carbonate[blank_end] → calcium [blank_start]sulfate[blank_end] + [blank_start]water[blank_end] + carbon dioxide

Label the diagram below