Chemistry || Reactivity Series C10 Flashcards
Oxidation?
Addition of oxygen.
Reduction?
Removal of oxygen.
Combustion Reactions Are?
They involve oxidation and are always exothermic.
The Reactivity Series Shows?
How easily metals are oxidised,
Shows their reactivity,
Carbon is often included in the reactivity series as well as metals because the metals position in the series depends on the reaction with carbon.
Why Is Hydrogen Also Included In Reactivity Series?
This shows the reactivity of metals with dilute acids..
Reactivity Series In Order?
Most reactive to least reactive,
Also shows the lest resistant to oxidation to the most resistant to oxidation,
Potassium, Sodium, Calcium, Magnesium, Aluminium, Carbon, Zinc, Iron, Hydrogen, Copper, Silver, Gold.
If Metal Is Below Hydrogen In Reactivity Series, It…?
It is less reactive than hydrogen,
This means it won’t react with a dilute acid.
What Metals Corrode Easiest?
Metals at the top of the Reactivity Series,
This is because they are least resistant to oxidation,
Metals at the bottom of the series are more resistant to corrosion because they are more resistant to oxidation.
Metals At The Top Of Series Are…?
Most reactive,
They easily lose their electrons to form actions (because they are metals so they’re positive),
They also oxidise easily.
Metals At The Bottom Of The Series…?
Less reactive,
They don’t give up theirs electrons to form cations as easily,
They are also more resistant to oxidation then metals higher in the series.
Practical - Predicting A Position In The Reactivity Series?
Reacting it with water and dilute acids,
Get metals of the same size and shape and place them into DILUTE hydraulic acid,
The more reactive the metal is, the fast the reaction will be with the acid,
Very reactive metals fizz vigorously in the acid,
Less reactive metals will just bubble a little bit,
Unreactive metals will not react with the dilute acid.
Hydrogen In Testing For Reactivity?
You can test hydrogen is forming in test tubes with dilute hydraulic acid and a metal by using the squeaky pop test with a lit splint,
The louder the squeaky pop, the more reactive a metal is.
How To Measure Hydrogen Released In Practical?
Use a gas syringe,
Measures the volume of gas given off at regular time intervals,
Or use a thermometer to measure by how inch the temperature changes in the acids. This works because the reaction between the dilute acid and the metal is exothermic.
How Does Reaction With Water Predict Reactivity Of Metals?
Metal + Water —> Metal Hydroxide + Hydrogen,
Very reactive metals will react vigorously with water,
Less reactive metals won’t react much with cold water. However, they will react with steam.,
Copper will not react with water or steam.
Practical - Apparatus To Find Reactivity With Less Reactive Metals?
Place a cotton wool soaked in boiling water into a test tube,
This wool will release steam,
Make sure to put the test tube on its side,
Place the metal half way down the test tube,
Put the lid (with a hole in for the extra tube coming out top of lid),
Place a lit splint near the hole and the steam leaving the test tube will burn and light,
This shows the hydrogen being given off by the metal.