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Every precipitate will be collected using a Hirsch funnel. Make definite that the plastic frit disc is firmly snapped in place in your focus. Replacement frit discs are available in case it become clogged or otherwise broken. Attach the funnel to a filter flask, using the neoprene adapter to ensure a good seal among the funnel and the flask. Attach the filter flask to your vacuum line and turn the vacuum on. Swirl the precipitate in solution and quickly pour the mixture onto the filter (while the solids are still suspended). Rinse the precipitate with a minimal amount of ice-cold water. Leave the space on until the precipitate is dry (~5 min.), and take note of the mass.
A single-effect evaporator is used to concentrate 60000 kg h-1 of a 40 wt % NaOH solution which is fed to the evaporator at 40°C. The concentrated liquid is a 55 wt % NaOH solut
describe valence bond theory and its limitations
Sedimentation: The process of allowing w ater to stand undisturbed in big tanks for some time in order to facilitate the settling down of the course suspended particles due to th
mass of atom
Q. What is an Emulsifier? An emulsifier is a compound that contains both polar and nonpolar groups and thus is drawn to the interface between the two phases of an emulsion to
achiral vs diastereomers
Define Electric Potentials in the Cell? The electric potential - at a point in space is de?ned as the change in the electrical potential energy of an in?nitesimal test charge w
what is the effect of cement refactory on wear and tear
1. (a) Reacting Pt 2+ with two equivalents of each of the ligands NO 2 - and en, it is possible to prepare several complexes that could be described as both geometric and opti
Explain relative electronegativities An analysis of relative electronegativities would suggest that, because C is slightly more electronegative than H, a important amount of th
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