This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
ScanSolve AI Answer
Hey McCarthy, good to see you again. The image shows a chemistry problem involving titration. I will solve question 4. 4. (a) What is the colour of the resultant solution at the end point? 4. (b) Calculate the average volume of Q used. Step 1: Determine the color of the resultant solution at the end point for question 4(a). The question refers to a titration where iron(II) ammonium sulphate is titrated with potassium dichromate(VI). Potassium dichromate(VI) is an oxidizing agent and is orange. Iron(II) ions are pale green. At the end point of this redox titration, the iron(II) ions have been completely oxidized to iron(III) ions (which are yellow/brown in solution). The first excess drop of dichromate will cause the solution to turn orange. The resultant solution at the end point will be orange. Step 2: Calculate the volume of Q used for each titration. The volume of Q used is the difference between the final reading and the initial reading. For the 1st titration: Volume of Q used = 20.6\, cm^3 - 0.0\, cm^3 = 20.6\, cm^3 For the 2nd titration: Volume of Q used = 20.0\, cm^3 - 0.0\, cm^3 = 20.0\, cm^3 For the 3rd titration: Volume of Q used = 20.1\, cm^3 - 0.0\, cm^3 = 20.1\, cm^3 Step 3: Calculate the average volume of Q used for question 4(b). To calculate the average volume, we sum the concordant (close) readings and divide by the number of readings. In titration, concordant readings are usually within ± 0.1\, cm^3 of each other. The readings are 20.6\, cm^3, 20.0\, cm^3, and 20.1\, cm^3. The readings 20.0\, cm^3 and 20.1\, cm^3 are concordant. The reading 20.6\, cm^3 is not concordant with the other two. Therefore, we use 20.0\, cm^3 and 20.1\, cm^3 for the average. Average volume of Q used = 20.0\, cm^3 + 20.1\, cm^32 Average volume of Q used = 40.1\, cm^32 Average volume of Q used = 20.05\, cm^3 a) The colour of the resultant solution at the end point is orange. b) The average volume of Q used is 20.05 cm^3. Send me the next one 📸