Sodium hydride, NaH, is available commercially as a
Chapter 4, Problem 4.43(choose chapter or problem)
Sodium hydride, NaH, is available commercially as a gray-white powder. It melts at 800C with decomposition. It reacts explosively with water and ignites spontaneously on standing in moist air. (a) Write a Lewis structure for the hydride ion and for sodium hydride. Is your Lewis structure consistent with the fact that this compound is a high-melting solid? Explain. (b) When sodium hydride is added very slowly to water, it dissolves with the evolution of a gas. The resulting solution is basic to litmus. What is the gas evolved? Why has the solution become basic? (c) Write an equation for the reaction between sodium hydride and 1-butyne, CH3CH2C # CH. Use curved arrows to show the fl ow of electrons in this reaction.
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