Acids And Bases 1
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片预览 (10 张)
What is an indicator?
An indicator shows by means of a colour change nether a substance is acidic or basic e.g. Litmus and Methyl Orange
What colour do acids turn litmus?
Acids turn litmus blue
What colour do bases turn litmus?
Bases turn litmus red
Name some acids
Hydrochloric Acid in the Stomach; Citric Acid in Acid Drops; Formic Acid in Nettle Stings.
What are alkalis?
Alkalis are bases that dissolve in liquid e.g. Sodium Hydroxide
What is a neutral substance?
A substance that is neither an acid or a base. The litmus turns green in neutral substances e.g. Water
What is litmus paper?
Litmus paper is absorbent paper soaked in litmus solution and dried
What is the pH scale?
A special scale marked from 0 to 14 which measures the acidity and basicity of acids and bases. A solution whose pH is 7 is neutral, a solution whose pH is less then 7 is acidic and a solution whose pH is greater then 7 is alkaline. The lower the pH is the more acidic a substance is and the higher the pH is, the more alkaline it is.
What is a pH sensor?
A pH sensor is used to find the pH of a substance. It is attached to a dialogue and tells us the exact pH of a substance.
What is universal indicator paper?
Universal Indicator is a mix of different indicators. A few drops of universal indicator is placed in a substance and the colour is measured on a set o colours.