Inspiring Learning Chemistry KS3

BOMBS AWAY

What happens when you mix an acid and an alkaline? What happens when the reaction takes place in the presence of water? Why do we use flowers/plants in bath bombs? Why do flowers smell nice?

Smells

  1. What is the difference between sweet smells and pungent ones?______
  1. Head out in the flower garden, what pungent and sweet smells are there?

Smells in the Park
Sweet Smells / Pungent Smells

Choose the plant or flower that you think smells the best and complete a scientific drawing of it in the box below.

Plant Name:
Why did you choose this plant?

Around the flower garden are the answers to these questions. As well as the answer there is a plant that is used commonly for its fragrance or for medicinal purposes, note down each plant as you go to solve the anagram.

Take the first letter from each plant. Use these letters to solve the scrambled up word.

  1. What do we use plant oils for? Name as many other things you can think of.
  1. What is the process called when we extract plant oils?

______

  1. What is meant by the term volatile?

______

  1. What does solubility mean?

______

  1. Do oils dissolve in water?

______

  1. What is the substance called when

oil and water are combined?

______

  1. Why do flowers smell nice?

______

  1. Why do we like the smell of flowers?

______

______

  1. What is diffusion?

______

Describe diffusion

______

Chemical Reactions – Bath Bombs

  1. What is a bath bomb?

______

  1. Are these chemical reactions? Yes or No, why?
  • A candle burning______
  • Ice melting into water______
  • An iron nail rusting______
  • A sherbet sweet fizzing in your mouth______
  • A cake baking______
  • Lemonade going flat______
  1. What ingredients make up a bath bomb?

______

Bicarbonate of soda is also called sodium bicarbonate. When an acid is added to a carbonate a reaction will take place.

Use the words and symbols below to put them in the correct order in the box to show this chemical reaction taking place.

Metal carbonate

Carbon dioxide

Acid

Metal salt

Water

++  +

Make your bath bomb!Use the instruction sheet to help you.

  1. Why do we use flowers/plants in bath bombs?

______

  1. Why do bath bombs and other cosmetics and chemicals need to be tested?

______

Extension Tasks

  1. Does the temperature of the water the bath bombs are placed in change the reaction at all?
/
  1. How does the pH fluctuate during the reaction?

  1. What happens if you change the ratios of citric acid and sodium bicarbonate?
/
  1. Are there any other influencing factors?