Showing 1–12 of 60 results
Chemistry: burning hydrogen produces pure water
How to prove that burning hydrogen produces pure water as “ash”. In the left-hand bottle bits of zinc are oxidised by a diluted sulphuric acid being poured in; the resulting hydrogen is collected through the second neck and exiccated in … Continued
Chemistry: lab equipment for nitrogen production
Nitrogen gas is an industrial gas produced by the fractional distillation of liquid air. Nitrogen is formally considered to have been discovered by Scottish physician Daniel Rutherford in 1772, Lavoisier referred to it as “mephitic air” or azote.
Chemistry: early spectroscope using prisms with graduations marking wavelengths of light
Optical spectrometer or spectroscope is an instrument used in spectroscopy for producing spectral lines and measuring their wavelengths and intensities. Joseph von Fraunhofer developed the first modern spectroscope, Gustav Robert Kirchhoff and Robert Bunsen discovered the application of spectroscopes to … Continued
Chemistry: how to obtain hydrogen at room temperature
An easy way to obtain hydrogen at room temperature. Bits of zinc were put on the bottom of a bottle; an 1:8 sulphuric acid solution was poured through the primary neck thus binding the water oxygen as zinc oxide, and … Continued
Chemistry: lab production of silicon tetrachloride SiCl4
Lab equipment for production of silicon tetrachloride : SiO2+Cl4+C2=SiCl4+2 CO. The silicon tetrachloride is condensed to colorless liquid form.
Chemistry: extracting oxygen from potassium chlorate
A simple device to extract oxygen from potassium chlorate. The potassium chlorate was heated in a flask and the resulting gas was collected in a closed cylinder immersed in water, where the water acted as a sealant to prevent air … Continued
Chemistry: chemical composition of carbon dioxide, weight analysis: H2CO3 + CaO=CaCO2+H2O
Carbon dioxide was the first gas to be described as a discrete substance. In the seventeenth century the Flemish chemist Jan Baptist van Helmont observed that when he burned charcoal in a closed vessel, the mass of the resulting ash … Continued