Question

Name Part B. Iron un Chloride (FeCl) plus Potassium Thiocyanate (KSCN Prepare a stock solution to be tested by adding 12 drops each of 0.1 M FeCl, and 0.1 MKSON well. Fill each of four medium sized test tubes (all the same size) half full of the stock solution FeSCN'(a) pale yellow colorless 1. The first tube is a control. Always compare to this color. 2. Add 20 drops of 0.1 Miron () chloride solution to the second tube. Observe the color change (from 2 to ?) Fe(a) + SCN' (aq) red It goes from yellow/oronge to red e right In what direction did the equilibrium shift? Using Le Chatelier's principle, complete the following statement to explain why the equilibrium shifted as it did. Circle the appropriate words and fill in the appropriate species When we (added/removed) the (reactant product) the equilibrium shifted to the (right left) and formed (more/less) (reactant/product). which is why it got darker. yellow to hpall yellow 3. Using a test tube holder, place the third tube in boiling water until you observe a color change. Record the color change (from ? to?): In what direction did the equilibrium shitt? ueft Rewrite the equation for the reaction in Part 1B and add the word "Heat" to the reaction as a product or a reactant based on which one would explain the changes that you observed. Using Le Chatelier's principle, explain why the equilibrium shifted as it did. Your explanation should describe whether this reaction is exothermic or endothermio. When we (added/removed) the (reactant/product) the equilibrium shifted to the (right/left) and formed (more/less) (reactant/product)). which is why it got lighter. If heat is a (reactant/product) the reaction must be (exothermic/endothermic). 4. Turn off the hot water bath. 5. Place the fourth tube in a 50:50 mixture of ice and water in a small beaker, Observe the color change (from ? to ?): In what direction did the equilibrium shift? Using Le Chatelier's principle, complete the following statement to explain why the equilibrium shifted as it did. Circle the appropriate words and fill in the appropriate species. When we (added/removed) the (reactant/product) the equilibrium shifted to the (right/left) and formed (more/less) (reactant/product)) which is why it got darker). 14 - 3 Work