Interpretation:
Two elements having properties similar to sodium are to be identified.
Concept Introduction :
Elements of the same group have similar physical and chemical properties because of the same outer shell electronic configuration.
Answer to Problem 7LC
Lithium and potassium
Explanation of Solution
Sodium belongs to group 1. Other elements of group 1 are lithium, potassium, rubidium, cesium, and francium. Because of a common outer shell electrical configuration, elements belonging to the same group share similar physical and chemical characteristics. Also, the atomic size of lithium and potassium are comparable to that of sodium.
Therefore, lithium and potassium have properties like sodium.
The position of elements in the periodic table helps in determining their properties.
Chapter 6 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
- The acid-base indicator HX undergoes the following reaction in a dilute aqueous solution: HX (color 1) H+ + X- (color 2). The following absorbance data were obtained for a 0.00035 M solution of HX in 0.1 M NaOH and 0.1 M HCI. Measurements were made at wavelengths of 450 nm and 620 nm using a 1.0 cm glass cuvette. 450 620 A(460 nm) A(630 nm) 0.1 M NaOH 0.1 M HCI 0.065 0.435 0.895 0.150 In the 0.1M NaOH solution, the indicator will be almost 100% in the X- form, while in 0.1M HCI, the indicator will be nearly 100% protonated (HX). Calculate the acid dissociation constant for the indicator if a pH=5 buffer solution containing a very small amount of indicator exhibits an absorbance of 0.567 at 450 nm and 0.395 at 620 nm (measured in a 1 cm glass cuvette).arrow_forwardShow work...give the name of the given compound. Don't give Ai generated solutionarrow_forwardShow work with explanation needed. don't give Ai generated solutionarrow_forward
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