U1 T8 Acids, Bases and Salts

Front

Effects of acidic, alkaline, and neutral solutions on litmus

Back

Acidic solutions turn blue litmus paper red. Alkaline solutions turn red litmus paper blue. Neutral solutions do not change the colour of litmus paper.

Front

Colours of phenolphthalein acid, alkali and neutral solutions

Back

Phenolphthalein: - Acidic solution: Colourless - Neutral solution: Colourless - Alkaline solution: Pink

Front

What is the benefit of using universal indicator solution/paper?

Back

Gives an indication of strength via pH scale

Front

pH scale colours

Back

Strong acid - red

Weak acid - orange /yellow

Neutral - green

Weak alkali - turquoise/pale blue

Strong alkali - deep blue/purple

Front

Classification of solutions based on pH

Back

- pH 0-2: Strong acid - pH 3-6: Weak acid - pH 7: Neutral - pH 8-11: Weak alkali - pH 12-14: Strong alkali

Front

Benefits of pH meter

Back

More accurate, can giving readings to 2 decimal places

Front

Give the name, formula and uses of 3 strong acids

Back

Front

Give the name, formula and uses of 2 weak acids

Back

Front

Acids in water

Back

Acids dissolve in water to produce hydrogen ions (H⁺ (aq)).

Front

Hydrogen ion concentration and pH

Back

The higher the concentration of hydrogen ions in an acidic solution, the lower the pH.