In the core practical investigating the neutralisation of 50 cm3 of dilute hydrochloric acid with powdered calcium hydroxide, what measurement should you take first?The pH of the hydrochloric acidThe temperature of the hydrochloric acidThe mass of the calcium hydroxideThe pH of the calcium hydroxide2Calcium hydroxide powder is added to the beaker of 50 cm3 of dilute hydrochloric acid in increments of 0.3 g. What is the correct way to take a new pH measurement each time a further 0.3 g is added?Heat the beaker over a Bunsen flame before testing with universal indicator paper/solutionTake a small drop of solution from the beaker with a dropping pipette and place in a spotting tile before testing with universal indicator paper/solutionPour 10 cm3 of the solution from the beaker into a test tube before testing with universal indicator paper/solutionPlace universal indicator paper/solution directly into the beaker3When plotting the results of this practical on a graph, what should you put on the x and y axes?Volume of hydrochloric acid on the y axis, mass of calcium hydroxide on the x axispH on the y axis, mass of calcium hydroxide on the x axisMass of calcium hydroxide on the y axis, pH on the x axispH of the hydrochloric acid on the y axis, pH of the calcium hydroxide on the x axis4From the graph, what can you determine by drawing a horizontal line from pH7 to meet the graph and then drawing a vertical line down to the x axis?The volume of hydrochloric acid required to neutralise 0.3 g of calcium hydroxideThe temperature of the solution at the point of neutralisationThe mass of calcium hydroxide required to neutralise 50 cm3 of hydrochloric acidThe mass of calcium hydroxide that will dissolve in 50 cm3 of hydrochloric acid5What is the balanced symbol equation for the reaction that has taken place?CaCl2 + 2H2O → Ca(OH)2 + 2HClCa(OH)2 + HCl → CaCl2 + H2OCa(OH)2 + 2HCl → CaCl2 + 2H2OCaOH + HCl → CaCl + H2O