Gravimetric Analysis and Gases

Question 1

mole ratio

Answer 1

unknown / known ——> known : known

Question 2

Limiting Reagent

Answer 2

The reagent which runs out first in a chemical reaction. This should be used for all stoichiometric calculations

Question 3

Excess Reagent

Answer 3

A reagent which is left over after a reaction goes to completion

Question 4

Gravimetric Analysis

Answer 4

A technique that uses change of mass to determine the amount or identity of a given substance

Question 5

Precipitate

Answer 5

A solid formed in a chemical reaction between two dissolved substances or gases

Question 6

Residue

Answer 6

The solid remaining in the filter paper after filtration

Question 7

Filtrate

Answer 7

The liquid that passes through the filter paper during filtration, consisting of solvent plus any dissolved solute

Question 8

Standard Laboratory Conditions (SLC)

Answer 8

The conditions assumed to be in place during laboratory experiments. These are defined as a temperature of 25oC and a pressure of 100 kPa

Question 9

General Gas equation

Answer 9

PV= nRT

P : pressure (kPa)
V : volume (L)
n : moles
R : 8.31 J K-1 mol-1 
T : temperature in K (C + 273)