In this lab, you will need 18ml of a 0.020 mol/L solution of KIO3 (aq) (potassium iodate). what mass of solid KIO3 needs to be measured out to prepare this solution? (3 marks)

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Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.