Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Acids and Bases
Acids and Bases+Ph+Indicator (titration)
| Question | Answer |
|---|---|
| What are acids and are they Harmful | A substance which turns blue litmus red and has a pH of less than 7. Strong acids are corrosive and can ‘eat away’ at materials e.g. Hydrochloric acid Weak acids are not harmful e.g. lemons (citric acid) |
| What Are Bases and are they Harmful | A substance which turns red litmus blue and has a pH of greater than 7. Bases neutralise acids Strong bases can be harmful e.g. concentrated sodium hydroxide Weak bases are not harmful e.g. baking soda (sodium bicarbonate) |
| WHAT IS THE DIFFERENCE BETWEEN AN ACID AND A BASE? | Acids turn litmus paper red Bases turn litmus paper Blue |
| WHAT IS AN INDICATOR? | An indicator is a compound that shows by means of a colour change whether a substance is acidic or basic Litmus paper is an indicator that only shows whether its an acid or base Universal indicator informs us of any pH on the scale e.g. 1 up to 14. |
| What is a neutral substance | This means they are neither acidic nor basic |
| WHAT IS THE PH SCALE? | The pH scale tells us how acidic or basic a substance is The pH scale goes from 0 to 14 A solution whose pH is 7 is neutral A solution whose pH is less than 7 is acidic Universal indicator paper is used to measure pH |
| REACTION OF ACIDS WITH METALS | An acid always reacts with a metal to produce a salt and hydrogen gas The word equation for the reaction between an acid and a metal is: Metal + acid 🡪 salt and hydrogen |
| HOW DO WE KNOW HYDROGEN IS PRESENT? | If hydrogen is present you will hear a ‘squeaky pop’ sound when you place a lit splint into the test tube |
| What is Neutralisation | When an acid reacts with a base a neutralisation reaction occurs They react to produce a salt and water The word equation for the reaction between an acid and a base is: An acid + a base 🡪 salt + water |
| What do you need to perform in order to carry out a neutralisation | In order to carry out a neutralisation reaction of an acid and a base, you need to perform a titration |
| What Equipment is used in the process of titration | Burette Tap Conical Flask Hydrochloric Acid Sodium Hydroxide Containing Phenolphthalein |
| outline a few steps in the titration process | A pipette is used to measure a base, sodium hydroxide The burette is used to measure the acid, hydrochloric acid We add the base to the conical flask and also an indicator to see a colour change |
| What is the product of neutralisation | When you add an acid to a base they neutralise – all the ions rearrange and the products salt and water are formed (e.g. NaOH and HCl) |
Created by:
JMahango
Popular Science sets