Earth & Water: pH Flashcards
What is the pH scale?
the pH scale is a measure of acidity/alkalinity of various solutions and you can use the pH scale to measure the pH of everyday solutions.
What is the effect of acids/alkalines (bases) on universal indicator paper?
When universal indicator is added to a solution, the color change can indicate the approximate pH of the solution. Acids cause universal indicator solution to change from green toward red. Bases cause universal indicator to change from green toward purple.
What are 3 ways that we can measure pH?
Litmus paper, Universal indicator, Red cabbage indicator
What are neutral solutions?
Neutral solutions are neither acidic or alakline.
What are some everyday neutralisation reactions?
Farmers use lime to neutralise acid soils,
Your stomach contains hydrochloric acid, and too much of this causes indigestion. Antacid tablets contain alkalines (bases) such as magnesium hydroxide and magnesium carbonate to neutralise the extra acid.
What is formed when an acid neutralises an alkali?
Salt + Water
Is carbon Dioxide more acidic or alkaline?
Carbon dioxide turns red in universal indicator which means that it is Acidic.
