Chemistry Flashcards
What is the chemical formula of water
H(little2)O
What is the chemical formula of carbon dioxide
CO(little2)
What is the chemical formula of chlorine
Cl(little2)
What is the chemical formula of ammonia
NH(little3)
What is the chemical formula of hydrogen?
H(little2)
What is the chemical formula of oxygen?
O(little2)
What is the chemical formula of the common ion ammonium?
NH(little4)^+
What is the chemical formula of the common ion nitrate
NO(little3)^-
What is the chemical formula of the common ion sulphate?
SO(little4)^2-
What is the chemical formula of the common ion hydroxide?
OH^-
What is the chemical formula of the common ion carbonate?
CO(little3)^2-
What is the equation to work out the number of moles?
Number of moles = mass in g (of element or compound) / Mr (of compound) OR Ar (of element)
What is the equation to work out the concentration?
Concentration = mass of solute / volume of solution
What is the equation to work out the Rf values in paper chromatography?
Rf value= distance travelled by solute / distance travelled by solvent
Acid+Metal carbonate —> ?
Acid + metal carbonate -> salt +water + carbon dioxide
Acid + metal oxide -> ?
Acid + metal oxide -> salt + water
Acid + metal hydroxide -> ?
Acid +metal hydroxide -> salt + water
Acid + metal ->
Acid +metal -> salt + hydrogen
Lead nitrate + sodium chloride -> ?
Lead nitrate + sodium chloride -> lead chloride + sodium nitrate
Metal + water -> ?
Metal + water -> metal hydroxide + hydrogen
Less reactive metal + steam-> ?
Less reactive metal + steam-> metal oxide + hydrogen
What does an arrow on top of another arrow pointing in the other direction mean?
Shows the reaction goes both ways
What is the equation for rate of reaction?
Rate of reaction = (amount of product formed OR amount of reactant uses) / time
What is the equation for working out the gradient?
Gradient = change in y / change in x
