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CR Scientific

Electrolysis & Electricity Lab Supplies

Various electrical items for electrochemistry and simple electrical experiments.

For electrodes, please see the Electrodes page.

Alligator Clip Leads, Economy.  Pack of 10.  Assorted colors, 2 each:  red, black, white, green, yellow.  Wire length about 35 cm (~ 14") with alligator clip on each end.   Resistance is about 0.8 to 1.0 ohm.

These are economy ones.  The boot tends to slip off the alligator clip when you're trying to connect them to something.  However, they're inexpensive, and they're still useful. 

These are for low-voltage, low-current applications anyway, so clip insulation is not strictly necessary.

#C1235 ... $3.99 / set


Ammeter, LED, 0 to 10 amperes at 4 to 30 volts DC.    Useful for electrolysis when applying Faraday's Law. 

Accuracy:  0.1%
Current draw (LED):  0.008 ampere or less
Current rating (max):  10 amperes
Size:  about 3.5 x 1.4 x 1 cm
Wire leads:  4 (2 for current and 2 for power supply)

Has built-in current shunt for up to 10 amps.

No enclosure;  you must provide your own, or attach the device to a suitable board.

#C296 ... $5.99 ea.


Battery Holder, "D" cell, Interlocking type, Blue Plastic. 

These modular battery holders allow connection in parallel, series, or combinations of both.

Each one holds a single "D" battery.  Place two of them in series for a 3-volt source.  Place two in series, then another pair of them in parallel, for a 3-volt source with double the amp-hour capacity.

Place four in series for a 6-volt source, and so on. 

A handful of these will provide numerous options for electrolysis, electronics, and electrical experiments.

#C298 ... $1.95 each


Electrodes:  Please see the Electrodes page for information & ordering.

Light Bulb, Miniature, #46 / E10

Light Bulb Receptacle, Porcelain

Ideal for low-voltage experiments in electricity and electrolysis.

Please see the Light Bulbs page for information & ordering

Switch, "Knife Switch", Single-Pole Single-Throw (SPST).  With screw-type connection terminals.   Metal switch with black plastic base and mounting holes.

Use for experiments with low DC voltages (up through 12 volts DC or thereabouts).  Current rating is unknown, but it's a good idea to keep currents low (< 1 A).   Use the appropriate combination of resistors and/or light bulbs to achieve this.

#C912 ... $2.35 each


Porous Cup
- permeable clay partition for electrolysis.

Allows ions to move in the electrolytic cell, but the cup prevents bulk mixing of anolyte and catholyte.  This is discussed further in our free article about electrolysis reactions.  Note that the porous cup is only slowly-permeable;  it may have to be soaked for a couple days before doing experiments.

O.D. approx. 38 mm,  I.D. approx. 33 mm,  Height approx. 75 mm

#C1826.............$2.59 each


CAUTION:  Wear gloves when handling electrodes; stamped metal may have sharp corners and / or edges. If you want to make the edges and corners smoother, use medium to fine sandpaper.

Also be sure to wear safety goggles during all experiments.


Electrolysis Apparatus

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Electrochemical series (Order of reactivity).

Higher in list = higher reactivity and more negative reduction potential.

    Al - Aluminum
    Zn - Zinc
    Fe - Iron
    Ni - Nickel
    Sn - Tin
    Cu - Copper

Notice that carbon doesn't really fit on this list when we're talking about aqueous electrochemistry (in other words, the typical electrolysis cell). 

Carbon, unlike the metals, does not actually go into solution as ions, nor can it be "plated out" from solution.  Instead it erodes away as fine particles of solid carbon that settle to the bottom.