Sji-International Bath bomb project Calvin Ng Li Hao 9NGh
The research and development of the G.E.M Aim- The bath bomb should be invigorating , fizzy , and colourful. Introduction – A bath bomb is a hard-packed mixture of chemicals which effervesces when in contact with water They are used to add scent and color to bathwater. How do bath bombs work? They react with water to produce bubbles and the oil and salt inside is released into the water. We have chosen Eucalyptus oil as it is very Invigorating and has a nice smell.
Research and Development We did the experiment several times trying different ratios of the salt : Citric acid : Baking soda. If there was not enough citric acid and baking soda , the bath bomb would not fizz / fizz very little . After trials we made a successful formula. Which is 15g : 15g : 30g We chose this fomula , as it resulted in a very fizzy bath bomb and was of the right size . ( table is on next slide)
Table of testsTest no. Salt ( sodium Citric Acid Baking Soda Comments chloride)1 7 7 7 The Bath bomb was too small and did not react well ( fizz)2 20 20 40 Bath bomb was fizzy enough but too big3 15 15 30 Bath bomb was of right size and fizzy
Method1. We added 15g of salt ( sodium chloride) and 15g of citric acid into a 150ml beaker .2. We added 30g of baking soda into the mixture3. Mixed the mixture well4. Added 2 drops (2ml)of Eucalyptus oil and a teaspoon of Olive oil (5ml).
Precision – We have taken down PRECISE measurements of the bath bomb so that it would be easy to reproduce an identical one. Purity – We dissolved the salt in pure water and filtered it. Therefore the salt is pure. 2 We have used steam distillation on the oil for its purity.It is important so that other substances would not get into the bathbomb and irritate the skin of people who would use this productTo ensure that the bath bomb is not contaminated , we havewrapped the bath bomb before packaging.
CONCLUSION! I believe that my group’s bath bomb should be selected for production as it is very good and invigorating , this product would definitely be very popular with 2 big markets – Young children who like to play ; the bath bomb makes the water green and its very fizzy. - People who want to relief their sore muscles / Tired people ; as the bath bomb is very invigorating and has a very strong scent.
Notes Helpful sources:WikipediaGoogleOther notes :The bath bomb project i.e. a video of the bath bomb beingplaced in water for tests can be found on YouTube here