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11 Nov 2019
Prelaboratory assignment Exp. 5 Equilibrium Name: Date: Lab 1. For the solutions that you will prepare in Step 2 of Part I below, calculate the [FeSCN Presume that all of the SCN-ions react. In Part 1 of the experiment, mol of SCN-= mol of FeSCN2·Thus, the calculation of [FeSCN2.] is: mol FeSCNP. L of total solution. Record these values in the table below AND ON THE REPORT SHEET! Beaker number 2 (blank) 0.00 M 2. A 3.00-mL aliquot of 0.001 M NaSCN is diluted to 25.0 mL with 0.1 M HNO. a. How many moles of SCN are present? b. If all of the SCN is complexed with Fe to form FeNCS what is the molar concentration of FeNCS2? 3. For preparing a set of standard solutions of FeNCs the equilibrium molar concentration of FeNCS2 is assumed to equal the initial molar concentration of the SCN in the reaction mixture. Why is this assumption valid?
Prelaboratory assignment Exp. 5 Equilibrium Name: Date: Lab 1. For the solutions that you will prepare in Step 2 of Part I below, calculate the [FeSCN Presume that all of the SCN-ions react. In Part 1 of the experiment, mol of SCN-= mol of FeSCN2·Thus, the calculation of [FeSCN2.] is: mol FeSCNP. L of total solution. Record these values in the table below AND ON THE REPORT SHEET! Beaker number 2 (blank) 0.00 M 2. A 3.00-mL aliquot of 0.001 M NaSCN is diluted to 25.0 mL with 0.1 M HNO. a. How many moles of SCN are present? b. If all of the SCN is complexed with Fe to form FeNCS what is the molar concentration of FeNCS2? 3. For preparing a set of standard solutions of FeNCs the equilibrium molar concentration of FeNCS2 is assumed to equal the initial molar concentration of the SCN in the reaction mixture. Why is this assumption valid?
Keith LeannonLv2
29 Aug 2019