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Y10 Acids and Bases

QuestionAnswer
What is the reaction between an acid and a base called Neutralisation
What colour does litmus paper turn in a base Blue
What colour does litmus paper turn in a acid Red
What is the pH scale A range of values used to indicate how acidic or basic a substance is
Give the pH of a substance with a Universal Indicator colour of Red 1-2
Give the pH of a substance with a Universal Indicator colour of Orange 3-5
Give the pH of a substance with a Universal Indicator colour of Green 7
Give the pH of a substance with a Universal Indicator colour of Blue 10
Give the pH of a substance with a Universal Indicator colour of purple 14
Why would you not use Hydrochloric Acid to neutralise a wasp sting? It is a strong acid and would do more harm than good
What substance would you use to neutralise a bee sting? Baking Soda. toothpaste
Complete this Calcium Hydroxide + Sulfuric Acid → _______ + _______ Calcium Sulfate + Water
Sodium Hydroxide + hydrochloric acid → _____ + ______ Sodium chloride + Water
Zinc + sulfuric acid → ___________ + ________ Zinc sulfate + hydrogen gas
Sodium + hydrochloric acid → ___________+ ____________ Sodium chloride + hydrogen gas
calcium carbonate + sulfuric acid → ________+_______+_____ calcium sulfate + carbon dioxide gas + water
sodium carbonate + hydrochloric acid → ________+____+_____ sodium chloride + carbon dioxide gas + water
How do you test for hydrogen gas? The pop test. light the gas and it it pops it is a positive test
How do you test for carbon dioxide gas? Bubble it through limewater. If it goes cloudy than it is carbon dioxide.
What factors can speed up the rate of reaction? Increase Temperature Increase the surface area to volume ratio (make it into a powder) Increase the concentration (Use of a catalyst)
How does increasing the temperature increase rate of reaction? Particles move faster and hence they collide more often. They also collide with more energy and so it is more effective.
How does increasing the Surface Area to volume ration increase rate of reaction? More particles are available to collide and so the frequency of collisions increase.
How does increasing the concentration increase the rate of reaction? There are more particles in a given volume so more collisions hence increase rate of reaction.
Created by: Discoweb