(a) Magnesium reacts with hydrochloric acid to produce hydrogen gas AH, for HCl(aq) = -167 16 kJ/mol AH", for MgCl2(aq) = -801.17 kJ/mol Calculate the standard enthalpy change for this reaction (11) For this reaction, explain the sign of AT for the surroundings Write the net ionic equation for this reaction What type of reaction is this? (0) In our everyday lives, we observe what happens around us using five biological senses. Give the names of the biological senses (vi) If you reacted magnesium with hydrochloric acid in the laboratory, specifically what would you observe? Give four observations (b) In the laboratory, what do we wear in different situations to protect ourselves? (c) Give four reasons for working in the fume hood in the laboratory