Balancing Equations Chemistry

Added on - 28 May 2020

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MODULE 1 SCENARIO-BASED PROBLEMScene 2Q1. Chemical equation for:a)Magnesium nitrate.Mg(NO3)2b)Calcium nitrate.Ca(NO3)2c)Sodium sulfate.Na2SO4Q2. Writing a balanced chemical reaction equations for the following solutiona)magnesium nitrate with sodium sulphateMg(NO3)2(aq)+Na2SO4(aq)2NaNO3(aq)+MgSO4(aq)b)b) calcium nitrate with sodium sulphateCa(NO3)2(aq)+Na2SO4(aq)2NaNO3(aq)+CaSO4(s)Q3. Based on the solubility table,calcium sulphate will precipitate out since it is isoluble inwater. When solution of the sodium sulphate is added to magnesium nitrate, the solutionremains colorless. But when sodium sulphate is added to calcium nitrate solutions, a whiteprecipitate is formed, thus distinguishing beteheen the two solutions (magnesium nitrateand calcium nitrate).Q4. Relative atomic mass of Calcium carbonatea)relative atomic mass of Ca40.08amu x6.022×1023atomsb)relative atomic mass of C12.01amu x6.022×1023atomsc)relative atomic mass of O16.00amu x6.022×1023atomsd)molar mass of CaCO3100.09amuQ5. If one litre of calcium carbonate solution contains 5.34 x 10-3molThe concentration is:5.34×103molLm=n×MWn=5.34×103;MW=100.09m=5.34×103×100.09=0.5344806g
Therefore,Calcium carbonate concentration¿0.5344806g/LQ6. As compare with the standards cited concentration, water with0.5344806g/Lcan beconsideredsoft waterScene 2Q7. The electron dot structures and Lewis structures of hydroxide, methanal and fluoride are asfollows:a)Hydroxide OH-b)Methanalc)FluorideQ8. the Lewis structures of water, sulfate, and phosphatea)WaterSulfate
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