Reacting Metals With Water Flashcards
How do alkali metals react with water
They react vigorously
They give off gas
The metal disappears
How do different alkali metal reactions differ
Potassium catches fire and burns with a lilac flame
Sodium and potassium react more quickly than lithium
(Reactivity increases as you move down the group)
What safety precautions are taken when reacting these metals
Safety screen
Safety glasses
Metals stored under oil
🔥❌
Flammable (could catch fire easily)
🛑🤚
Corrosive if the metal reacts with water forming an alkali e.g. sodium hydroxide
Why are lithium ,sodium and potassium stored under oil
They could react with water/moisture in the air
list lithium sodium and potassium in order of reactivity
Potassium
Sodium
Lithium
What are the alkaline solutions formed as Group 1metals react with water called
Hydroxides
Word equation for metal+water
Alkali
^
Metal+water->metal hydroxide + hydrogen
What apparatus is used when reacting metals with water
Gas oooooo
Test tube. I ____I
Water. I. I I I
Beaker. I. I I I
Filter funnel I. / \ I
Calcium (metal). ———*—
What happens to calcium,magnesium,copper when reacted with water
Calcium-sinks and rises,bubbles of gas, vigorous reaction,calcium disappears
Magnesium- a few bubbles of gas,reacts slowly
Copper-does not react
What two things are produced when metals react with water
Metal hydroxide+ hydrogen
List calcium, magnesium and copper in order of reactivity
Calcium
Magnesium
Copper
Word equations for calcium magnesium and copper with water
Calcium+water->calcium hydroxide + hydrogen
Magnesium +water-> magnesium hydroxide + hydrogen
Copper+water-> no reaction
List all of the metals so far in order of reactivity with water
Potassium (most)
Sodium
Lithium
Calcium
Magnesium
Iron
Copper
