Lithium Metal Dissolves in Water to Yield Hydrogen Gas and Aqueous

question 56

Multiple Choice

Lithium metal dissolves in water to yield hydrogen gas and aqueous lithium hydroxide. What is the final concentration of hydroxide ions when 5.500 g of lithium metal is dropped into 750. mL of water

• A) 1.06 M
• B) 0.528 M
• C) 2.11 M
• D) 0.792 M
• E) 0.943 M

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Definitions:

Null

Often refers to a hypothesis which assumes no significant difference or effect in a statistical analysis.

Alpha

In statistics, the threshold probability of wrongly rejecting the null hypothesis, typically set at 0.05.

T-statistic

A ratio computed from the observed sample mean difference divided by the standard error of the mean, used in hypothesis testing.

Critical Values

Critical values are thresholds in statistical hypothesis testing that define the boundary between the region where the null hypothesis is rejected and the region where it is not rejected.