Chemistry
Showing 21–40 of 78 results
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Chemistry
Flask Stand
Moulded in polypropylene, this flask stand gives a stair-like top view. Every step provides excellent support to the round bottom flasks up to point of contact. This flask stand can hold round bottom flasks up to 10 Ltrs. Capacity. This stackable flask stand can also be steam autoclaved
SKU: TJS-00192 -
Chemistry
GRAPHITE CRYSTAL MODEL
A ball-and-spoke structural model of the graphite crystal form of carbon, permanently mounted on a clear hexagonal acrylic base. Clearly shows the layered structure. It contains 39 balls, each 22mm in diameter. Overall dimensions: height 27cm, base side 14.5cm.SKU: n/a -
Chemistry
Hoffmann Voltameter
Hoffman Voltameter (PTFE) with electrodes, Used for demonstrating
the decomposition of water, determination of chemical composition by electrolysis and with
applications in the evaluation of the electrochemical equivalent of hydrogen. The apparatus
should be set up vertically using a clamp and stand to hold it safely. Connect the terminals to a DC power source. Matches will be required to test for gases.
Chemicals required:
Water, molar sodium, or potassium sulphate or sulphuric acid.
Supplied in neat, well-protected packing case.
The glass unit has two connected limbs, each of approximately 50ml capacity
(graduated 2 – 50ml), integral reservoir tube and funnel-shaped bulb, with a stopcock
at the top of each limb.
Supplied with electrodes, 2 carbon and 2 platinum. • Requires 12V power supply.
———————————SKU: TJS-00209 -
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Chemistry
Hope’s Apparatus, Econom
To demonstrate that the maximum density of water is at 4ºC. Comprises a cylindrical vessel of sheet metal mounted on a base and has an annular trough encircling about midway along its length, which is used for placing ice and salt mixture. Fitted with tubulures to carry thermometers and rubber stoppers.
SKU: TJS-00219 -
Chemistry
Intermediate Spectrometer
This is a robust instrument designed specifically for student use, which nevertheless is capable of very high performance. The main structure is of heavy cast metal, with bright plated fittings. The complete instrument is suppliedwithwooden case.
Scale: The 150mm diameter circle with protective plastic shield is fixed to the telescope movement and the table is attached to the double ended vernier, which reads to 1 minute of arc. Both telescope and table rotation fine adjustment screws, and release of a clamping screw enables adjustment of both movements to bemade by hand.
Collimator: Mounted on fixed and fitted with 178mm focus achromatic objectives, 25mm clear aperture. Also fitted is a unilaterally adjustable slit7mmlong.
Telescope: Mounted on moveable pillar and fitted with 178mm Focus achromatic objective, 25mm clear aperture. Also fitted is a 8× Ramsden eyepiece and a glass cross line graticule. Both the telescope and collimator have rack and pinion focusing. Means are provided for leveling the axis of both optical units and for squaring them to axis ofrotation.
Prism Table: The table is marked with lines to assist placing the prism with respect to the table leveling screws.
Standard Accessories Supplied: 1 Prism clamp, 1 diffraction grating holder, 1 magnifier, 1 tommy bar for adjusting optical axis, 1 wooden case.
SKU: TJS-00351 -
Chemistry
NaCl Crystal Sodium Chloride Molecular Model
The NaCl crystal or sodium chloride molecular model shows how sodium (Na⁺) and chloride (Cl⁻) ions arrange themselves in a regular, repeating cubic structure, forming a crystal lattice. Each ion is surrounded by six oppositely charged ions, creating a strong, stable ionic bond.
SKU: TJS-00211
