Answered: 1. A 0.1250-g sample of pure (100%) of…

Introductory Chemistry For Today

8th Edition

ISBN:9781285644561

Author:Seager

Publisher:Seager

Chapter7: Solutions And Colloids

Section: Chapter Questions

Problem 7.39E

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Question

1. A 0.1250-g sample of pure (100%) of K₂Cr₂O₇ was dissolve in 250-mL volumetric flask, and dilute to volume, producing a concentration of 1.700 × 10^-3 M. The resulting solution is an example of a standard solution prepared from a primary standard.

Select one:

a. True

b. False

2. Which of the following is not an example of a standard solution?

a. 1000 ppm Lead Nitrate solution

b. 1.000g pure sodium carbonate dissolved in 1L of solution

c. 3:4 nitric acid: hydrochloric acid solution

d. NaOH solution standardized using KHP

e. 0.104 M NaOH

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