Topic 7 - Acids and Bases

    Topic 7 - Acids and Bases 29/07/21

Task 1 pH Questions: What is pH?  Potential of Hydrogen How do you measure pH?  pH Paper What is the scale pH is measured on? Acid/basic water is What pH level does water have?  Neutral What is the most acidic pH level? 0 What is the most basic pH level? 14

0-6 acidic/becoming weaker 7 neutral 8-14 basic/becoming stronger All liquids acids or basics More Hydrogen ions = Acidic  More Hydroxide ions = Bases Dissolve in water lose 1 electron and become acid

Substance	Acid/Base Prediction	Colour changes from? Litmus	Result
Dishwashing liquid	base	Blue to blue	Neutral
Orange juice	Acid	Blue to red	acid
Toilet Cleaner	Base	Blue to red	acid
Window cleaner	acid	Blue to blue	base
Milk	base	Red to red	base
Lemon Juice	acid	Blue to red Red no change	acid
tea	base	Blue to red	acid
vinegar	acid	Blue to blue	acid
Distill water	base	Blue to red	base
Apple juice	base	Blue to red	base
water	Neutral	Blue to blue red to red	neutral