Testing (paper2) Flashcards
What are flame tests used for
To identify metal ions
How to carry out a flame test
Light a Bunsen burner and open to the blue flame, pick up a small sample of the substance being tested on a wire loop and hold in the flame to see a colour change
What is the wire loop cleaned in before testing
Hydrochloric acid
What metal is used for the wire loop
Platinum as it is unreactive and has a high melting point
What is a cheaper option of platinum
Nichrome
Learn the metal ion table
Learn the metal ion table
Using scientific instruments to identify metals can improve…
Sensitivity, accuracy and speed.
What does a flame photometer do
Measures the light intensity of the flame colours produced
Different metal ions produce different what
Emission spectra,
What does sodium hydroxide react with to make a precipitate
Metal ions
What is this used for
Decontaminating rivers and identifying metal ions
What is a confirmatory test used for
To identify ammonia or other substances to make sure that it is correct
What do halogens produce
Halide ions
