What does evaporating dish mean?

Definitions for evaporating dish
evap·o·rat·ing dish

Here are all the possible meanings and translations of the word evaporating dish.

Wikipedia

  1. Evaporating dish

    An evaporating dish or watch glass is a piece of laboratory glassware used for the evaporation of solutions and supernatant liquids, and sometimes to their melting point. Evaporating dishes are used to evaporate excess solvents – most commonly water – to produce a concentrated solution or a solid precipitate of the dissolved substance. Most are made of porcelain or borosilicate glass. Shallow glass evaporating dishes are commonly termed "watch glasses", since they resemble the front window of a pocket watch. Some used for high-temperature work are of refractory metals, usually of platinum, owing to its non-reactive behaviour and low risk of contamination. The capacity of evaporators is usually small – in the range 3–10 ml. Larger dishes, up to 100 ml, are different in shape, and are more hemispherical. The evaporator is used most often in quantitative analysis. In the determination of silicon content in an organic sample, a small and accurately-measured quantity of a substance is added to the large amount of sulfuric acid, then heated in an evaporating dish. The dish is heated with a Bunsen burner, until only stable precipitate remains, which contains the silica content. The dish is then closed and heated at high temperature until completely clean, fused silica is produced. Comparison of the initial weight of the substance and that of the fused silica allows the content of silicon in the sample to be determined. The shape of the evaporating dish encourages evaporation in two ways:

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Numerology

  1. Chaldean Numerology

    The numerical value of evaporating dish in Chaldean Numerology is: 2

  2. Pythagorean Numerology

    The numerical value of evaporating dish in Pythagorean Numerology is: 6

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  1. evaporating dish


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