1
answer
0
watching
82
views
19 Nov 2019
All of the chromium in a 0.750 gram sample of ore is converted to K_2CrO_4. The K_2CrO_4 is dissolved in acid and the CrO4^-2(aq) is titrated with a 0.0200M solution containing Sn^+2 ions. The skeleton reaction is below. CrO_4^-2 + Sn^+2 rightarrow Cr^+2 + Sn^+4 The lab technician finds that the 0.750 gram sample of ore requires 13.75 ml of the Sn^+2(aq) solution to reach end point. Complete and balance the reaction for the titration and determine the mass % of chromium in the ore.
All of the chromium in a 0.750 gram sample of ore is converted to K_2CrO_4. The K_2CrO_4 is dissolved in acid and the CrO4^-2(aq) is titrated with a 0.0200M solution containing Sn^+2 ions. The skeleton reaction is below. CrO_4^-2 + Sn^+2 rightarrow Cr^+2 + Sn^+4 The lab technician finds that the 0.750 gram sample of ore requires 13.75 ml of the Sn^+2(aq) solution to reach end point. Complete and balance the reaction for the titration and determine the mass % of chromium in the ore.
Nestor RutherfordLv2
19 Nov 2019