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Chemical Analysis: Identifying Ions

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卡片总数: 20 张•内容版本: v4•公开卡包•更新时间: 8/1/2026

卡片预览 (20 张)

#1
正面 (问题)

Lithium flame test result

背面 (解答)

crimson

#2
正面 (问题)

Sodium flame test result

背面 (解答)

yellow

#3
正面 (问题)

Potassium flame test result

背面 (解答)

lilac flame

#4
正面 (问题)

Calcium flame test result

背面 (解答)

orange/red

#5
正面 (问题)

Copper flame test result

背面 (解答)

green flame

#6
正面 (问题)

Copper sodium hydroxide test result

背面 (解答)

blue precipitate

#7
正面 (问题)

Iron (II) sodium hydroxide test result

背面 (解答)

green precipitate

#8
正面 (问题)

Iron (III) sodium hydroxide test result

背面 (解答)

brown precipitate

#9
正面 (问题)

Aluminium sodium hydroxide test result

背面 (解答)

white precipitate, dissolves in excess to form a colourless solution

#10
正面 (问题)

Calcium sodium hydroxide test result

背面 (解答)

white precipitate

#11
正面 (问题)

Magnesium sodium hydroxide test result

背面 (解答)

white precipitate

#12
正面 (问题)

Describe the test for carbonate anions.

背面 (解答)

• Add dilute acid • Fizzing/effervesence observed as CO2 is released • Collect gas and bubble it through limewater • Limewater goes cloudy

#13
正面 (问题)

Describe the test for sulfate anions.

背面 (解答)

• Add dilute hydrochloric acid • Add barium chloride solution. • White precipitate forms

#14
正面 (问题)

Describe the test for halide anions.

背面 (解答)

• Add dilute nitric acid • Add silver nitrate solution

#15
正面 (问题)

What are the results for the halide ion tests?

背面 (解答)

chloride - white precipitate bromide - cream precipitate iodide - pale yellow precipitate

#16
正面 (问题)

Describe how to perform a flame test to identify metal ions.

背面 (解答)

• Clean a nichrome wire loop by holding it in a blue flame from a bunsen burner. • Dip the loop into the sample you want to test and put it back in the flame. • Record the colour of the flame.

#17
正面 (问题)

What are the limitations of doing a flame test?

背面 (解答)

• only works for samples that contain a single metal ion • if the sample tested contains a mixture of metal ions then the flame colours of som ions may be masked by the colours of others

#18
正面 (问题)

What are the equations for the halide tests?

背面 (解答)

Ag+(aq) + Cl-(aq) → AgCl(s) Ag+(aq) + Br-(aq) → AgBr(s) Ag+(aq) + I-(aq) → AgI(s)

#19
正面 (问题)

Whats the equation for the sulfate ion test?

背面 (解答)

Ba2+ + SO42-(aq) → BaSO4(s)

#20
正面 (问题)

What are the advantages of using flame emission spectroscopy to identify ions?

背面 (解答)

• very sensitive - they can detect very small amounts of substances • very fast • very accurate