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Solved: Suppose you have 5.00 g of powdered magnesium

Chemistry: A Molecular Approach | 3rd Edition | ISBN: 9780321809247 | Authors: Nivaldo J. Tro

Problem 105IE Chapter 4

Chemistry: A Molecular Approach | 3rd Edition

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Chemistry: A Molecular Approach | 3rd Edition | ISBN: 9780321809247 | Authors: Nivaldo J. Tro

Chemistry: A Molecular Approach | 3rd Edition

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Problem 105IE

Suppose you have 5.00 g of powdered magnesium metal, 1.00 L of 2.00 M potassium nitrate solution, and 1.00 L of 2.00 M silver nitrate solution, (a) Which one of the solutions will react with the magnesium powder? (b) What is the net ionic equation that describes this reaction? (c)What volume of solution is needed to completely react with the magnesium? (d) What is the molarity of the Mg2+ ions in the resulting solution?

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Solution: We can say that all metals are not equally reactive. That is why, reactive metals can displace less reactive metals from their compounds in solution or molten form. In order to know, which metal is more reactive, several experiments were performed, and finally a series known as the reactivity or activity series was developed. Step1: a) Out of potassium nitrate and silver nitrate solution, potassium is placed above magnesium in the reactivity series and hence is more reactive. So, no reaction occurs when powdered magnesium metal is mixed with potassium nitrate. Again, silver is placed below magnesium in the reactivity series and hence is less reactive. So, when magnesium metal and silver nitrate solution are mixed, magnesium displaces silver from its solution. Thus, silver nitrate reacts with magnesium powder. Step2: b) Net ionic equation shows only those chemical species which are taking part in a chemical reaction. while writing the ionic equation, we write out all the soluble compounds as ions and eliminate ions common to both the reactants and products. This will give us the net ionic equation. Now, silver nitrate reacts with magnesium metal to give the following reaction: Mg(s) + 2AgNO (aq)3------> Mg(NO ) (aq) 3 2(s) -----(1) From the rules of solubility, we can say that, AgNO and Mg(NO ) are water soluble 3 3 2 compounds and will dissociate into ions in aqueous...

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Chapter 4, Problem 105IE is Solved
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Textbook: Chemistry: A Molecular Approach
Edition: 3
Author: Nivaldo J. Tro
ISBN: 9780321809247

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Solved: Suppose you have 5.00 g of powdered magnesium

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