How to calculate percent mass?
2017-05-25 8:12 pm
A certain brand of iron supplements contains FeSO4(7h2o) with miscellaneous binders and fillers. suppose 21.32ml of KMnO4 solution are needed to oxidize Fe2+ to Fe3+ in a O.5580 g pill. What is the mass percent of FeSO4(7H2O) in the pill? ( molar mass 278.03g/mol)
回答 (3)
2017-05-25 10:51 pm
write a balanced equation
use dimensional analysis
YOU fill in the blanks with molarity of the KMnO4 and coefficients of the balanced equation
21.32mL KMnO4.. .. 1L.. .. . __ mol KMnO4.. ..__mol FeSO4•7H2O.. .... ..55.84g Fe
----- ----- ----- ------ x ----- ----- x ---- ----- ----- ---- x ---- ----- ----- ----- ---- ---- x ---- ---- ---- ---- ----- ---- -- =
.. .. ... .1. ... ... ... .1000mL.. ... . .. 1L.. ... ... . .__ mol KMnO4.. ..... . 273.03mol FeSO4•7H2O
use dimensional analysis
YOU fill in the blanks with molarity of the KMnO4 and coefficients of the balanced equation
21.32mL KMnO4.. .. 1L.. .. . __ mol KMnO4.. ..__mol FeSO4•7H2O.. .... ..55.84g Fe
----- ----- ----- ------ x ----- ----- x ---- ----- ----- ---- x ---- ----- ----- ----- ---- ---- x ---- ---- ---- ---- ----- ---- -- =
.. .. ... .1. ... ... ... .1000mL.. ... . .. 1L.. ... ... . .__ mol KMnO4.. ..... . 273.03mol FeSO4•7H2O
2017-05-25 10:28 pm
You have to provide the molar concentration (molarity) of the KMnO4 solution.
2017-05-25 8:13 pm
Formula.
收錄日期: 2021-04-24 00:27:48
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