Chapter 15- Analysing water for Salts Flashcards Preview

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Flashcards in Chapter 15- Analysing water for Salts Deck (9)
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1
Q

Quantative Analysis

A

How much of a substance is present

2
Q

Qualitative Analysis

A

What is present in a sample

3
Q

Electrical Conductivity

A

Salts are ionic they produce mobile ions. They can therefore conduct electricity.
Quick and inexpensive method

4
Q

Colorimetry

A

Colour levels are compared with a set of standards

Involves shining a light of complementary colout and measuring the amount absorbed.

5
Q

UV-Visible Spectroscopt

A

Absorption is related to concentration

  • Light of a speicfic frequency is used
  • Can be used for colourless and coloured substances.
6
Q

Atomic Absorptopin Spectroscopy

A

Prescence of metal ions

7
Q

Gravemtric Analysis

A

Analysis by weight, collecting and drying percipitates

8
Q

Prinicple of stoichiometry

A

Study of ratios of stances involved in chemical reaciton

9
Q

4 Steps in stoichiometric problems

A
  1. Write a balanced equationfor the reaction indentifying known and unknown quantities of substances
  2. Calculate the number of moles known to the substance
  3. Find the mole ratio
  4. Calculate the required quantity of the substance.