Food Tests Investigation.docx

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Food tests investigation Testing for starch 1) Place your food on a dropping tile. 2) Drop a few drops of iodine solution onto the food. 3) Record your results and answer the questions.

Food

Colour

Is starch present?

1) What colour do you see when starch is present?

2) What colour do you see when starch is not present?

Testing for Protein 1) Put your food in a test tube. 2) Add a few drops of the biuret solution. 3) Record the results and answer the questions.

Food

Colour

Is protein present?

1) What foods had protein in them?

2) What colour change did you see when protein was present?

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Testing for glucose (a sugar) 1) Add the food to a test tube. 2) Add the Benedict’s solution. 3) Put in a water bath and leave for 5-10 minutes. 4) Record your results and answer the questions?

Food

Colour

Is glucose present?

1) What colour changes did you see when glucose was present?

2) What did you see when no glucose was present? Testing for fat 1) Rub the food on the greaseproof paper. 2) Record your results and answer the questions. Food

Does it turn transparent? (see through)

1) How could ethanol be used to test for fat?

2) What food contained fat?

Is fat present?

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