Chemistry, 16.12.2019 18:31 azimgd1612
The amount of iron in steel can be determined by titration with dichromate. first, the steel is dissolved in hydrochloric acid to oxidize all the iron to fe 2 + . an indicator is added that will react with excess dichromate. then, potassium dichromate is added to the solution until the end point is reached. cr 2 o 2 − 7 + 6 fe 2 + + 14 h + ⟶ 2 cr 3 + + 6 fe 3 + + 7 h 2 o for the analysis of 2.00 g of steel, the titration required 21.20 ml of 0.1800 m k 2 cr 2 o 7 . what was the mass percentage of iron in this steel sample?
Answers: 3
Chemistry, 22.06.2019 00:20
Use the gizmo to find the concentration of the mystery ch3cooh. use the titrant and indicator shown below perform the titration. what is the titrant volume? titrant analyte indicator titrant volume analyte concentration naoh ch3cooh phenophthalein select one: a. 20.0 ml b. 27.0 ml c. 30.0 ml d. 24.0 ml
Answers: 2
Chemistry, 22.06.2019 16:00
Click the button that shows the correct relationship of the electron affinities of the elements sodium and phosphorus. sodium’s electron affinity value is more negative than the electron affinity value of phosphorus. phosphorus’ electron affinity value is more negative than the electron affinity value of sodium. this information cannot be determined using the periodic table. answer is b on e2020.
Answers: 3
The amount of iron in steel can be determined by titration with dichromate. first, the steel is diss...
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