Science Experiment
Today in science we are doing a Science Experiment called Neutralisation.
Universal Indicator-Shows if it is an Acid or a Base
-Changing colors
Blue Green Red = pH Scale
Universal Indicator = Solution: The main components of a universal indicator, in the form of a solution, is thymol blue, methyl red, bromothymol blue, and phenolphthalein. This mixture is important because each component loses or gains protons depending upon the acidity or alkalinity of the solution being tested.
pH Scale = pH is a measure of hydrogen ion concentration, a measure of the acidity or alkalinity of a solution. The pH scale usually ranges from 0 to 14. Aqueous solutions at 25°C with a pH of less than 7 are acidic, while those with a pH greater than 7 are basic or alkaline.
Hydrochloric Acid = Hydrochloric acid or muriatic acid is a colorless inorganic chemical system with the formula HCl. Hydrochloric acid has a distinctively pungent smell. It is classified as strongly acidic and can attack the skin over a wide composition range since the hydrogen chloride completely dissociates in an aqueous solution.
Sodium Hydroxide = Sodium hydroxide is used to manufacture soaps, rayon, paper, explosives, dyestuffs, and petroleum products. It is also used in processing cotton fabric, laundering and bleaching, metal cleaning and processing, oxide coating, electroplating, and electrolytic extracting.
Neutralization
A chemical reaction occurs when you mix together an acid and a base. The base cancels out the effects of the acid. The reaction is called a neutralization reaction because a neutral solution is made if you just the right amount of acid and a base together.
- Add 2mL of Na0h into a test tube.
- 2 drops of Universal Indicatior.
- Add drops of HCI until you reach a neutral pH.
Awesome work Tamara! You have found heaps of information, and made a range of colours. It would have been great to see an explanation of how/why you managed the different colours, how did you make green? blue? orange? yellow? red?
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