Page 15 - Fuel Cell Teacher Edition

Prep aring the

15% Na OH S ol ution

hese instructions are for preparing a 15% MATERIALS INCLUDED
Solution of Sodium Hydroxide from Pellets. • 30g NaOH pellets
TInitial versions of this kit came with NaOH in
a solution, but over time this solution was found to
be unstable. Current kits have the instructor make MATERIALS REQUIRED
the 15% solution before the lab. If you received pre-
made 15% solution that had excessive white powder • Latex or nitrile gloves
in it please contact us at 1-888-221-4344 for a free • Paper towel or chemwipes
replacement. • Graduated cylinder at least 250mL
• Clear 500mL or 1L PET bottle w/cap
WARNiNG! • Ice water bath
Sodium Hydroxide causes an exothermic • Funnel
reaction when mixed with water! This gives off
a great deal of heat and could melt through a
thin walled plastic bottle or break glassware. PROCEDURE
Keep the bottle immersed in an ice water bath 1. Fill a container with ice water such that when
until it is no longer warm to the touch!
the 1L PET bottle is immersed the ice water
surrounds over half of the bottle.

Xiv TOTAL REDOX™ – FUEL CELLS TOTAL REDOX™ – FUEL CELLS Xv