1. Explain why there are two different concentrations of iron(III) nitrate. 2. W
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Question
1. Explain why there are two different concentrations of iron(III) nitrate. 2. Why is it necessary to record the temperature even though you will not need it in your calculations? 3. The reversible reaction: has come to equilibrium in a vessel of specific volume at a given temperature. Before the reaction began, the concentrations of the reactants were 0.060 molV/L of SO2 and 0.050 mol/L of O2. After equilibrium is reached, the concentration of SOs is 0.040 moVL. What is equilibrium constant Kc?Explanation / Answer
1) Iron (III) nitrate has two different forms that exist in nature. One is the dehydrated form, ferric nitrate which has molecular formula Fe(NO3)3, molecular weight-241.857 g/mol and the hydrated form, ferric nitrate nonahydrate which has the molecular formula Fe(NO3)3.9H2O, molecular weight-403.992 g/mol. Since there are two different molecular weights so ferric nitrate has two different concentrations.
2) Temperature recording while doing any experiment is very important since the properties of the molecules are dependent on temperature. Suppose, for an example, during viscosity/ surface tension measurement the liquids show different molecular interaction at different temperatures. So, with changing temperature their viscosity and surface tension also changes and doing the same experiment at different temperatures gives different results. The solubility of any solid in any solvent also changes with changing temperatures. This is why it is necessary to note down the temperature while doing experiments.
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