8c4 Flashcards
what do you look for to tell it is a chemical reaction?
colour change
gas produced
temp change
new substance change
what is meant by a physical change?
no new substances are produced but there is a change is appearance of the chemical. ie state changes or dezolving
what is a mixture?
a mixture is a chemical that had 2 or more different atoms (elements)
how can you tell a element from a compound in a diagram?
a element will have only one colour atom but a compound will have two
what come first in chemical reaction equation reactants or products
reactants then products ie
reactants products
carbon dioxide + water (+ light energy)→glucose + oxygen
what is a dependant variable
the variable you measure
what is interdependent variable
the variable you change
does the temperature surrounding a endothermic reaction go up or down.
it goes down
does the temperature surrounding a exothermic reaction go up or down.
it goes up
how do we test for
put the in a test tube and put a splint in it is it goes pop it is
what is the control variable
A variable that you keep the same.
what is a compound
a material made up of two elements
What is the Word equation for iron sulphide?
iron + sulther ironsluthide
what would be the products of magnesium and hydrochloric acid mixed together?
hydrogen and magnesium chloride.
what is the difference between a mixture and a compound?
a mixture is when two or more elements come together but they do not mix into one substance. a compound is when two or more elements come together to make one substance.
