What is the balanced equation for the combustion of magnesium?AMg (s) + O2 (g) → MgO (g)BMg (s) + 2 O2 (g) → MgO4  (aq)CMg (s) + O2 (g) → MgO2 (g)D2 Mg (s) + O2 (g) → 2 MgO (s)

8. Solid magnesium, Mg, reacts with oxygen gas, O2, to form the solid magnesium oxide, MgO. Which is a balanced chemical equation for this reaction? A. Mg + O  MgO B. Mg + O2  MgO2 C. Mg + 2O  2MgO D. 2Mg + O2  2MgO

PURPOSE: The purpose of this lab is to determine the molar enthalpy of combustion (ΔHCOMB) of Magnesium. Mg + ½O2 → MgO This reaction is too dangerous to carry out directly to measure the enthalpy Dangers of Burning Magnesium. Instead of carrying out this target reaction directly we will be carrying out two of the known reactions (1 & 2) and the 3rd known reaction value is also too dangerous to carry out so its value is given. TARGET: Mg(s) + ½O2(g) → MgO(s) ΔH = KNOWN EQUATIONS: 1) Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) ΔH = kJ 2) MgO(s) + 2HCl(aq) → MgCl2(aq) + H2O(l) ΔH = kJ 3) H2(g) + ½O2(g) → H2O(l) ΔH = -285.8 kJ Two experiments will be carried out using calorimetry to determine the ΔH for Reaction 1 & Reaction 2. EXPERIMENT # 1 Experiment #1 (Known Reaction 1 above) Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) will be carried out using calorimetry. A certain mass of Mg will be added to a certain volume of HCl. The AQUEOUS solution of HCl is very DILUTE so we will consider it WATER for our calculations.Once the Mg is placed in the HCl the t1 will be taken and once the reaction is over (the temperature stops changing) the t2 will be taken. Watch this video link for Experiment 1 and enter the data into the observation table. (4 marks) Mass of Mg g Mass of HCl (mL=g) g t1 oC t2 oC *** Remember HCl is going to be considered H2O CALCULATIONS FOR EXPERIMENT #1 Use the data above and calculate the molar enthalpy (ΔHx) of the reaction in terms of Mg. HINT you need to do the 2 steps for this calculation ΔH = mcΔt & ΔH = nΔHx and this answer will be your ΔH value for your KNOWN equation #1. The video mentions figuring out the Limiting Reagent but it is Mg that you are calculating in terms of. (6 marks) EXPERIMENT # 2 Experiment #2 (Known Reaction 2 above) MgO(s) + 2HCl(aq) → MgCl2(aq) + H2O(l)will be carried out using calorimetry. A certain mass of MgO will be added to a certain volume of HCl. The AQUEOUS solution of HCl is very DILUTE so we will consider it WATER for our calculations.Once the MgO is placed in the HCl the t1 will be taken and once the reaction is over (the temperature stops changing) the t2 will be taken. Watch this video link for Experiment 2 and enter the data into the observation table. (4 marks) Mass of MgO g Mass of HCl (mL=g) g t1 oC t2 oC *** Remember HCl is going to be considered H2O CALCULATIONS FOR EXPERIMENT

Create the balanced chemical equation for the following reaction.solid magnesium reacts with aqueous cadmium permanganate*You must use subscripts where appropriate for full marks!!!

Which of the following is a combustion reaction?A.MgSO4 + Ba BaSO4 + MgB.NaOH + HCl NaCl + H2OC.CO2 + H2O H2CO3D.C3H8 + 5O2 3CO2 + 4H2OSUBMITarrow_backPREVIOUS

The balanced symbol equation for the reaction between magnesium and hydrochloric acid is shown below.When writing the ionic equation the ions present in the reaction need to be identified, in the reactants and products.Match the reactants and products to the ions and descriptions. HydrogenMagnesium chlorideMagnesiumHydrochloric acidPossible AnswersI DON'T KNOWRESETSUBMIT ANSWER