Quantitative chem

Question 1

Mole

Answer 1

the SI unit for amount of substance

Question 2

Molar Mass

Answer 2

the mass in grams of one mole of that substance

Question 3

What volume does a mole of gas occupy

Answer 3

1 mole of gas occupies 22,4 dm 3at STP

Question 4

Solution

Answer 4

homogenous mixture of solute and solvent

Question 5

Solute

Answer 5

the substance that is dissolved in the solution

Question 6

Solvent

Answer 6

the substance in which another substance is

dissolved, forming a solution

Question 7

Concentration

Answer 7

the amount of solute per unit volume of

solution

Question 8

Yield

Answer 8

A measure of the extent of a reaction, generally measured by comparing the amount of prodyct against the amount of product that is possible

Question 9

Stoichiometry and irons
Determine how many chloride irons are58.5 g of NaCl

Answer 9

If there is 58, 5 g of NaClThere is one mole of sodium chloride and hence and Avagard Rose number of chloride irons
This is because the ratio of sodium irons to chlorine irons are 1:1

Question 10

Disassociation

Answer 10

Association takes place when the cations and I lion I removed the ionic lattice when a solid dissolves in water. I am dipole intermolecular forces exist between the ions and the water molecules. Ions move into aqueous solution surrounded by water molecules

Ions are not formed. They already exist

Question 11

Ionisation

Answer 11

Ionisation takes place when a covalent compound dissolves in water. The covalent molecules break up to form ions in the solution. You’re an ionisation, ions are formed from molecules

Question 12

How to calculate Ltd reagent

Answer 12

Firstly, determine the moles of each reactant present
Use the mall ratios to determine which one is the limiting reagent!!!
Answer the question

Question 13

Percentage yield

Answer 13

The theoretical yield is the maximum amount of product which can be Produced based in a chemical Reaction

%yield = actual/theoretical