Titration Flashcards
Chemical Changes (9 cards)
What is the purpose of using a universal indicator in titrations?
To estimate the pH of a solution by turning a variety of colours
Each colour indicates a narrow range of pH values.
What is the color change of a universal indicator in acidic to alkaline solutions?
Red in acidic solutions to violet in alkaline solutions.
What is important to observe during a titration between an alkali and an acid?
A sudden colour change at the end-point.
Name a single indicator that can be used in titrations.
Litmus, phenolphthalein, or methyl orange.
What color does litmus turn in alkalis and acids?
Blue in alkalis and red in acids.
What color does phenolphthalein turn in alkalis and acids?
Pink in alkalis and colourless in acids.
What color does methyl orange turn in alkalis and acids?
Yellow in alkalis and red in acids.
Fill in the blank: A universal indicator is made from a mixture of __________.
[different indicators]
True or False: A universal indicator provides a single color for each pH level.
False.
