Quantitative Chemistry Flashcards
What is the law of conservation of mass?
A law that states that no atoms are lost or made
during a chemical reaction, so the mass of the
products equals the mass of the reactants.
How do you calculate uncertainty?
Calculate the range in results and divide by 2.
What is the value of the Avogadro constant?
6.02x10^23
What are the units for concentration?
Mass per given volume.
Why is it not always possible to obtain the
calculate amount of product?
The reaction may not go to completion because
its reversible, some of the product may be lost
when it is separated from the reaction mixture or
some of the reactants may react in ways different
to the expected reaction.
What is yield?
The amount of product obtained in a reaction.
How can yield be calculated?
% Yield = (Mass of product / theoretical mass) x
100
What is atom economy?
A measure of the amount of starting materials
that end up as useful products.
How can atom economy be calculated?
Atom Economy = (RFM of desired product / RFM
of all reactants) x 100
What is the unit for concentration?
Mol/dm^3
