a) Patients who have a zinc deficiency can take tablets consisting of a hydrated zinc sulfate, ZnSO4.xH₂O, to treat this problem. A pharmacist heated a 5.073g sample of hydrated zinc sulfate. After heating, the mass of the remaining anhydrous zinc sulfate was 2.848g. Use this information to determine the value of x in this hydrated salt. b) In a second experiment to verify the value of x, the pharmacist reacted a 7.579g sample of the hydrated zinc sulfate with a small excess of powdered magnesium. This should reduce all of the Zn²+ ions to Zn(s): ZnSO4.xH₂O + Mg → Zn + MgSO4 + xH₂O The solid zinc product was dried and weighed, and was found to have a mass of 1.630g. Use this information to obtain the moles and molar mass of the ZnSO4.xH₂O in the sample and hence find the value of x. You must show all of your working out. Make sure you use accurate values of molar and atomic masses. c) You should find that the values of x obtained by the two experiments do not exactly agree. Give three suggestions to explain this, based on the experimental procedures.

a) Patients who have a zinc deficiency can take tablets consisting of a hydrated zinc sulfate, ZnSO4.xH₂O, to treat this problem. A pharmacist heated a 5.073g sample of hydrated zinc sulfate. After heating, the mass of the remaining anhydrous zinc sulfate was 2.848g. Use this information to determine the value of x in this hydrated salt. b) In a second experiment to verify the value of x, the pharmacist reacted a 7.579g sample of the hydrated zinc sulfate with a small excess of powdered magnesium. This should reduce all of the Zn²+ ions to Zn(s): ZnSO4.xH₂O + Mg → Zn + MgSO4 + xH₂O The solid zinc product was dried and weighed, and was found to have a mass of 1.630g. Use this information to obtain the moles and molar mass of the ZnSO4.xH₂O in the sample and hence find the value of x. You must show all of your working out. Make sure you use accurate values of molar and atomic masses. c) You should find that the values of x obtained by the two experiments do not exactly agree. Give three suggestions to explain this, based on the experimental procedures.

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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States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.

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