Chemistry, 14.11.2019 05:31 gameranonymous266
A25.00 ml sample containing an unknown amount of al3+ and pb2+ required 17.14 ml of 0.04907 m edta to reach the end point. a 50.00 ml sample of the unknown was then treated with f− to mask the al3+ . to the 50.00 ml sample, 25.00 ml of 0.04907 m edta was added. the excess edta was then titrated with 0.02064 m mn2+ . a total of 26.5 ml was required to reach the methylthymol blue end point. determine pal3+ and ppb2+ in the unknown sample.
Answers: 2
Chemistry, 22.06.2019 14:10
16. in a reaction that has reached equilibrium, a. the forward and reverse reactions are occurring at the same rate. b. the reactants and products are in equal concentrations. c. the forward reaction has gone further than the reverse reaction. d. there are equal numbers of atoms on both sides of the equation. e. a, b, and d are correct.
Answers: 2
Chemistry, 22.06.2019 15:20
Draw any one of the skeletal structures of a 2° alkyl bromide having the molecular formula of c6h13br and two stereogenic centers. indicate chirality by using wedge and hashed wedge notation. lone pairs do not need to be shown.
Answers: 1
A25.00 ml sample containing an unknown amount of al3+ and pb2+ required 17.14 ml of 0.04907 m edta t...
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