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2019-03-05 8:12 am
A solution is prepared by mixing 19.3 mL of .00200 M Fe(NO3)3 with 12.7 mL of .00200 M KSCN in an initially dry beaker. Assuming the volumes are additive compute the inital concentration of the Fe3+ ion and the SCN- ion in the mixture
回答 (2)
2019-03-05 9:03 am
Volume of the final solution = (19.3 + 12.7) mL = 32.0 mL
Considering the dilution effect, compute the initial concentrations just after mixing:
[Fe³⁺]ₒ = (0.00200 M) × (19.3/32.0) = 0.00121 M
[SCN⁻]ₒ = (0.00200 M) × (12.7/32.0) = 0.000794 M
Considering the dilution effect, compute the initial concentrations just after mixing:
[Fe³⁺]ₒ = (0.00200 M) × (19.3/32.0) = 0.00121 M
[SCN⁻]ₒ = (0.00200 M) × (12.7/32.0) = 0.000794 M
2019-03-05 8:14 am
Danger
收錄日期: 2021-05-01 22:31:12
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20190305001215AAl3RyC