Procedure: 1. Place few crystals of cupric sulfate pentahydrate, CuSO.•5H2O, in an evaporating dish. Note the color. 2. Heat the evaporating dish until the crystals crumble to pieces. Describe the color change. 3. Cool the evaporating dish and add 1 to 2 drops of water to the residue. Observe the color change. Question: 1. Note the color of cupric sulfate pentahydrate crystals. 2. Describe the color change observed when the heated crystals were dissolved in water.

Procedure: 1. Place few crystals of cupric sulfate pentahydrate, CuSO.•5H2O, in an evaporating dish. Note the color. 2. Heat the evaporating dish until the crystals crumble to pieces. Describe the color change. 3. Cool the evaporating dish and add 1 to 2 drops of water to the residue. Observe the color change. Question: 1. Note the color of cupric sulfate pentahydrate crystals. 2. Describe the color change observed when the heated crystals were dissolved in water.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question 2 Answer all the question below, 1. In one gravimetric analysis, a sample that weighed 0.810g is analysed for its phosphorous (P) content by precipitating the phosphorous as Mg,P2O. The precipitate is filtered, washed and weighed. The mass of the precipitate is found to be 0.4250 g. a) Why must the precipitate be washed? b) Calculate the percentage of P. 2. In one gravimetric analysis, the aluminum in a 1.2g sample of impure NHAI(SO4)2 was precipitate as hydrous ALO3.XH2O. The precipitate was filtered and ignited at 1000 °C to give anhydrous Al203 which weighed 0.1798g. Calculate the % Al inthe sample. 3. A sample of 0.4500g impure potassium chloride was dissolved in water treated with excess silver nitrate solution. 0.8402 g of silver chloride was precipitated. What is the percentage of potassium chloride in the sample?
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Please do question 6
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