# 3.3 moles and volumes Flashcards

unit conversions

cm^3 -> dm^3

divide 1000

dm3 -> cm3

X 1000

Cm3 to ml

1cm3=1ml

Idm3 to Liters

1dm3=1L

Calculate

Number of moles

with concentration and volume

Conc (mol/dm3) **X** vol (dm3)

What is the

ideal gas equation

PV=nRT

what are the units for

PV=nRT

P- pressure (pa)

V-volume (m3)

n- number of moles (mol)

R- gas constant (J/mol/k)

T- temprature (K)

Unit conversion

kPa -> Pa

X1000

Unit conversion

K->.c

-273

When do we use the

ideal gas equation

differnet temps and pressures for greater accuracy we use the ideal gas equation

What are the assumptions made about

the ideal gas equation

- the molecules are in random motion
- elastic collisions
- negligible size
- no intermolecular forces

In PV=nRT

whats the value of the constant R

8.314

Define

A standard solution

is a solution whose concentration is known.

which glassware is used to make a standard solution.

volumetric flask

The tolerances of the volumetric flask

100cm3 volumetric flask: +/- 0.20cm3

250cm3 volumetric flask: +/- 0.30cm3