Flashcards
SC25/26
Flashcards do conjunto (11)
- 1How do you carry out a flame test? (3 steps)1. Light a Bunsen burner and open the air hole to give a hot blue flame.
2. Pick up a small sample of the test substance using a wire loop.
3. Hold the sample in the edge of the flame and observe the flame. - 2What is done to a wire loop before testing each sample?The wire loop is cleaned in hydrochloric before each sample.
- 3Describe 2 wire loops.1. Platinum wire has a high melting point and it is unreactive. It gives no colour to the flame.
2. Nichrome alloy is often used instead. Although it produces its own faint orange colour, it is much cheaper. - 4What flame colour is produced by Lithium?Red
- 5What flame colour is produced by Sodium?Yellow
- 6What flame colour is produced by Potassium?Lilac
- 7What flame colour is produced by Calcium?Orange-red
- 8What flame colour is produced by Copper?Blue-green
- 9What are the advantages of flame photometry?1. Higher sensitivity
2. Increased accuracy
3. Increased speed - 10What is the role of the flame photometer?It measures the light sensitivity of the flame colours produced by metal ions.
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Informações
- Descrição
- Year 10 Chemistry FlashCards sobre SC25/26, criado por Ihsan Choudhury em 26-04-2018.
- Criado por
- Ihsan Choudhury
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