IB Chemistry HL S1.1 Introduction to the particulate nature of matter questions

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Question 1

Paper 2Medium6 marks

A laboratory has several batches of a dry solid containing crystalline sulfur and sodium chloride. The relative amounts of the two substances vary between batches. Sodium chloride dissolves in water, whereas sulfur does not. A student wants to obtain dry sodium chloride from one batch.

(a)

Classify each of sulfur and sodium chloride as an element, compound or mixture.

[2]
(b)

State one feature, other than the variable proportions, that distinguishes this sample from a compound.

[1]
(c)

Outline a sequence of steps to obtain dry sodium chloride from the sample.

[3]

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