SECTION 1 (AC1.1 / AC1.2) You will need to answer each of the questions in this section. You must include your full workings of your answers within your submission. 1. You have been given a sample of unknown molarity. Calculate the molarity of a solution which has been prepared by dissolving 8.75 moles of sodium chloride in enough water to produce a solution of 6.221. 2. You have a sample which consists of 428g sodium hydroxide (NaOH) dissolved in enough water to make a final solution of 6.41. What is the molarity? 3. You have been given a sample of 4.85 moles of glucose (C6H12O6) and you want to make a 0.75M solution with it. What will be the final volume of solution? 4. 37.0cm³ of a sodium hydroxide (NaOH) solution was pipetted into a conical flask and titrated with a standard solution of 0.3 mol dm-³ hydrochloric acid according to the following equation: NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(1) A universal indicator solution was used for the titration and it was found that 22.0 cm³ of the acid (HCI) was required to neutralise the alkali (NaOH). Calculate the molarity of the sodium hydroxide.

Fig: 1