Chemistry

This Mole Set contains samples of four different metals and helps students to visualise mole of substance in solid state, as well as developing better understanding of the concept of the mole, mass, molar mass, along with the differing properties of the various metals. The set contains four element specimens: copper, iron, zinc and aluminium, each containing approximately one mole (6.023 1023 atoms) of the element. Comparison of each sample, side-by-side, clearly shows that the same molar amount of different elements have different masses and occupy different volumes, due to each element having different atomic mass and density.

This Melting Point Apparatus has been designed with safety in mind. A single control knob on the front panel incorporates the mains ON/OFF switch with arbitrary scale of 0 to 10. A rapid heat switch allows higher temperatures to be obtained quickly. Sample tubes are illuminated from behind and magnified through a lens. A selector at the rear of the instrument allows a light or dark background. Ceramic insulation around the aluminium heating block minimises heat transfer to the casing.

The 8000 pH meter features an easy to read, LCD display and is supplied with a budget pH electrode. The 8000 pH meter indicates pH over the range of 0 to 14 pH with a resolution of 0.01 pH and an accuracy of ±0.05 pH. The pH readings are manually temperature compensated over the range of 0 to 60 °C (default 25 °C). The unit will power off automatically after ten minutes, maximising battery life. At the touch of a button, the instrument will automatically re-calibrate itself when used in conjunction with pH buffer solutions. Features: •Easy to use re-calibration feature •±0.05 pH accuracy •2 year guarantee on meter, 6 months on electrode •Operating Temperature 0ºC to 50ºC

Budget pH electrode. •Ideal for pH measurement of liquids and semi-solids •Ideal for laboratory applications •Ø12 x 120 mm •Temperature operating range 0 to 60°C

The FiveEasy F20 meter has a large, well-structured display, intuitive button arrangement and simple menu which ensures that measurements can be performed in just a few clicks. •Compact design saves space; Through its compact design and the ability to remove the sensor holder and store it on the side of the meter, little bench space is needed. •Simple and secure data transfer; The FiveEasy meter allows data to be exported either directly to a printer or a PC for further processing using RS232 or USB ports. •Range: pH 0.00 – 14.00 x 0.01 •Temperature range: 0 °C – 100 °C •3-point calibration •Supplied with a LM438 general pH sensor •Dimensions: 227 x 147 x 70 mm •Weight: 630 g •4.3” LCD display