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Georgia has a bucket of sandy sea water, and wants to separate it out into it's components: sea-salt, water and sand. What steps should she take to achieve this? How can she check at the end that the water is pure?

First, she should filter the mixture using a filter funnel and filter paper to remove the sand. Then, she should distill the remaining solution, using a bunsen burner, a distillation column and a condensi...

Answered by Nikhil B. • Chemistry tutor

7106 Views

Write a balanced equation for the reaction of calcium hydroxide with nitric acid.

Ca(OH)2 + 2HNO3 --> Ca(NO3)2 + 2H2O

Answered by Jonathan C. • Chemistry tutor

34438 Views

Construct expressions for pH, Kw and Gibbs Free energy

pH=-log[H+] Kw=[H+][OH-] GFE=enthalpy-(temp*entropy)

Answered by Joe D. • Chemistry tutor

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Why can endothermic reactions occur spontaneously if the entropy change is negative for a cooling process?

An endothermic process is one which cools as the reaction proceeds meaning that the entropy change of the reaction will be negative. These reactions may still be feasible as the spontaneous nature of a re...

Answered by Eve R. • Chemistry tutor

13667 Views

Explain why graphite is able to conduct electrcity and diamond is not

Carbon in graphite has three bonds, where as the carbon atoms in diamond form four bonds to one another. As carbon has 4 electrons in its outer shell, this means graphite has one free electron which is ab...

Answered by Qasim J. • Chemistry tutor

7297 Views