Princess Tiara’s Journey to Happiness!

The Halloween Science Show

For those of you haven’t watched the show, you may want to catch it first at the Science Centre before it ends! For more details, click here!

For those of you who have seen the show and were wondering how some of the cool tricks shown actually worked, here are explanations so that you can create your own journey to happiness!

The Colour-changing potions

The Science behind it: Dry ice is the solid form of carbon dioxide gas at -78°C. When it was added to the liquids, it reacted with the water to form carbonic acid. As the liquids contained colour-changing pH indicators, this weak acid would then change the colour of the liquids according to their acidity.

The Silver Mirror

The Science behind it: When siver nitrate, ammonia, an alkali solution and dextrose are mixed together in a transparent flask, silver is formed and will coat its container. This is a common method used to make mirrors.

The Magic Paper

The Science behind it: In the show, the dish used to collect the ‘royal saliva’ contained an alkali solution which would be able to turn the golden paper (which was a pH indicator) red as it was in the presence of an alkali.

2 responses to Princess Tiara’s Journey to Happiness!

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