
iGCSE Acids and Alkali Keywords
Flashcard
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Science
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9th - 10th Grade
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Practice Problem
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Medium
Jenny Boyes
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22 questions
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1.
FLASHCARD QUESTION
Front
What is the definition of Acid?
Back
Produces hydrogen ions (H+) in aqueous solution. They have pH range between 0 and 7. known as proton donors.
2.
FLASHCARD QUESTION
Front
What is the definition of Alkali?
Back
Produces hydroxide ions (OH-) in aqueous solution. They have a pH range between 7 and 14. are soluble bases.
3.
FLASHCARD QUESTION
Front
What is the definition of Base?
Back
A substance which reacts with an acid in a neutralisation reaction to form a salt and water only. Bases are known as proton acceptors.
4.
FLASHCARD QUESTION
Front
What is the definition of Indicator?
Back
A chemical used to distinguish between acidic and alkaline solutions. Examples include phenolphthalein, litmus and methyl orange.
5.
FLASHCARD QUESTION
Front
What is the definition of pH scale?
Back
A measure of the acidity or alkalinity of a solution ranging from 0 to 14. The pH can be measured using universal indicator or a pH probe.
6.
FLASHCARD QUESTION
Front
What is the definition of Universal indicator?
Back
A mixture of dyes that changes colour gradually over a range of pH and is used for testing for acids and alkalis.
7.
FLASHCARD QUESTION
Front
What is the definition of Salt?
Back
A substance formed when acids react with metals, bases or carbonates. Most contain a positive metal ion and a negative ion composed of non-metals.
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