Spring Flashcards
Boiling point of water?
100 degrees centigrade
What do you call the change from gas to solid?
Sublimation
Solute (e.g sugar) and solvent ( eg water) make what?
Solution
When gas is heated what does it do?
Expands and rises
What four things increase the rate of a reaction?
Temperature, surface area, concentration and catalyst.
What is rust?
Iron oxide
What gas turns limewater milky?
Carbon dioxide
What happens in respiration?
Glucose and oxygen react to release energy and carbon dioxide and water.
What is the most reactive gas in air?
Oxygen
What is the chemical test for oxygen?
It re lights a glowing splint
What is the chemical test for carbon dioxide?
It turns limewater milky
What paper turns from blue to pink with water?
Cobalt chloride paper
What is the chemical test for hydrogen?
A lit splint makes a squeaky pop
What does a catalyst do?
Speeds up a reaction but it remains unchanged
What do we call a substance that contains only one type of atom?
An element
