Chemistry, 06.10.2019 07:01 Jerrikasmith28
It was decided to analyze a waste solution that contains an unknown concentration of mn2+ ions using colorimetry. a strong oxidizing agent was added to a 6.40 ml sample of the solution to convert the colorless manganese ions into purple permanganate ions. after the reaction is complete, the solution was diluted to 100.0 ml and analyzed in a colorimeter. the percent transmittance of the solution was determined to be 47.8 %. also a calibration curve was prepared by using a series of solutions with known concentrations of permanganate and the equation for the best fit line was found. y=1560⋅x+0.024 what is the absorbance of the permanganate in the diluted waste solution? absorbance = what is the concentration of the permanganate in the diluted waste solution? concentration of the permanganate = m what is the concentration of the mn2+ ions in the original waste solution? concentration of the mn2+ ions = m
Answers: 3
Chemistry, 21.06.2019 22:30, micvar9646
Consider the following system at equilibrium. caco3(s) ca2+(aq) + co32–(aq) the addition of which compound will cause a shift in equilibrium because of a common ion effect? ccl4 co2 cuso4 na2co3
Answers: 3
Chemistry, 21.06.2019 23:30, huangjianhe135
Start an single atom tab. observe the decay of polonium-211. after each decay, press the reset nucleus button to watch the process again. write a description of alpha decay for po-211
Answers: 2
Chemistry, 22.06.2019 11:00, hannah5143
The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.
Answers: 2
It was decided to analyze a waste solution that contains an unknown concentration of mn2+ ions using...
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