Purchase Solution

Dry Hydrogen Selenide

Not what you're looking for?

Ask Custom Question

a) Write a balanced equation for the reaction of aluminium selenide with water to Hydrogen selenide and solid aluminium hydroxide (including physical states) showing the sequence of partially balanced equations needed, including a brief description of the strategy used.

b) The density of hydrogen selenide at STP is 3.61 g litre-1. Draw a diagram of how to prepare a jar of dry hydrogen selenide, using a selection of the following equipment and materials. Include a brief description of how the arrangement achieves the desired result.

Equipment Liquids
Round bottomed flask Concentrated hydrochloric acid
Additon funnel Concentrated nitric acid
Wash bottle Water
Porcelain boat Solids
Side Arm connector Calcium chloride granules
Bent glass tube Sodium chloride
Gas jar Aluminium selenide
U tube Sodium hydroxide
Straight glass tube

c) Write a balanced chemical equation for the reaction between hydrogen selenide and tin > solid tin selenide and hydrogen gas. Explain briefly why the equation accounts for the fact that the gas volume is unchanged.

d) The oxide formed when selenium burns in air, dissolves in water to give a solution of selenious acid H2SeO3. The solution conducts electricity, and turns blue litmus paper red. Give the evidence that supports classifying H2SeO3 as an acid and identify the positively charged ion present in an aqueous solution of the acid.

e) Write a balanced equation for the breakdown of selenious acid in water, and deduce the charge on the other ion that is formed.

Purchase this Solution

Solution Summary

Solution contains chemical equations, explanations for each question and a diagram of the experiment needed to prepare a jar of dry hydrogen selenide. 625 words.

Solution Preview

Aluminum selenide : Al2Se3 MP:960 oC --> solid in Room Temperature
Hydrogen selenide : H2Se MP: -66 oC ; BP : -41 oC --> gas in Room Temperature
Aluminum hydroxide : Al(OH)3
Al2Se3(s) + 6 H2O(l) --> 3 H2Se(g) + 2 Al(OH)3(s)

First place coefficient 2 to Aluminum hydroxide due to two Al in the aluminum selenide..and put coefficient 3 to hydrogen selenide due to 3 Selenium in the aluminum selenide..and balance hydrogen and oxygen by putting coefficient 6 to water.

In order to get a dry hydrogen selenide, we should remove ...

Purchase this Solution

Free BrainMass Quizzes
Organic Chemistry Naming: Alkanes

This is a quiz which is designed to assist students with learning the nomenclature used to identify organic compounds. This quiz focuses on the organic compounds called Alkanes.

Match Elements with their Symbols

Elements are provided: choose the matching one- or two-letter symbol for each element.

Functional groups in Organic Chemistry

You will be tested on the names of functional groups in Organic Chemistry. It is very important to know the functional groups to understand Organic reactions.


The quiz helps in revising basic concepts about thermochemistry.