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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

The photo here depicts what happens when a coil of magnesium ribbon and a few calcium chips are placed in water.

  1. (a) Based on these observations, what might you expect to see when barium, another Croup 2A element, is placed in water?
  2. (b) Give the period in which each element (Mg. Ca, and Ba) is found. What correlation do you think you might find between the reactivity of these elements and their positions in the periodic table?

    images

(a)

Interpretation Introduction

Interpretation: Based on given reactions of Mg and Ca , the expected reaction of barium with water and the correlation between elements towards reactivity in same group have to be explained.

Concept introduction:

  • Mg, Ca and Ba are group IIA (alkaline earth group) elements.
  • The reactivity of elements in a group (especially group IA and IIA) generally increases on descending the periodic table.
Explanation

Reaction of barium with water,

    Ba(s)+2H2O(l)Ba(OH)

(b)

Interpretation Introduction

Interpretation: Based on given reactions of Mg and Ca, the expected reaction of barium with water and the correlation between elements towards reactivity in same group have to be explained.

Concept introduction:

  • Mg, Ca and Ba are group IIA (alkaline earth group) elements.
  • The reactivity of elements in a group (especially group IA and IIA) generally increases on descending the periodic table.

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