You are given a ~0.1 M NaOH solution and need to standardize it, so you will be making a 250.00 mL 0.1 M KHP solution....?
2018-05-13 4:38 pm
You are given a ~0.1 M NaOH solution and need to standardize it, so you will be making a 250.00 mL 0.1 M KHP solution. Approximately what mass of KHP ought to be measured?
回答 (2)
2018-05-13 5:01 pm
✔ 最佳答案
Molar mass KHP = 204.22g/mol To produce 250mL ( 0.250L) of 0.1M solution
Mass KHP required = 204.22g/mol * 0.250L* 0.1mol /L * 204.22g/mol = 5.1055g
2018-05-13 4:59 pm
The molar mass of KHP (C₈H₅O₄K) = (12.0×8 + 1.0×5 + 16.0×4 + 39.0) g/mol = 204.0 g/mol
No. of moles of KHP needed = (0.1 mol/L) × (250/1000 L) = 0.025 mol
Mass of KHP needed = (0.025 mol) × (204.0 g/mol) = 5.1 g
No. of moles of KHP needed = (0.1 mol/L) × (250/1000 L) = 0.025 mol
Mass of KHP needed = (0.025 mol) × (204.0 g/mol) = 5.1 g
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