List of Partners vendors. Share Flipboard Email. Anne Marie Helmenstine, Ph. Chemistry Expert. Helmenstine holds a Ph. She has taught science courses at the high school, college, and graduate levels. Facebook Facebook Twitter Twitter. Featured Video. Cite this Article Format. Helmenstine, Anne Marie, Ph. Dissolve Definition in Chemistry. Properties of Ionic and Covalent Compounds. Pure Substance Definition in Chemistry. To pass or cause to pass into solution. A website design technique borrowed from the film and video industry in which the transition between two Web pages is represented visually by one page fading into another.
Also known as a "soft cut," the result is achieved in the HTML coding of the images to gradual pre-determined durations. See slide transition. To destroy , make disappear. To liquify , melt into a fluid. To terminate a union of multiple members actively, as by disbanding. To disperse , drive apart a group of persons. To break the continuity of; to disconnect; to loosen; to undo; to separate. Bible, Daniel v. Gently warm the poacher and note when each substance melts.
Students can be asked to predict which substance will melt first. Later, place the poacher in ice water to cool and again ask students to predict and observe the order in which the substances solidify. Use analogies to explain melting; for example, talk about building a house with Lego and pulling apart the bricks to form a pool of loose bricks.
Students should experience opportunities to observe dissolving and distinguish it from melting. Dissolve coloured materials such as copper sulphate available from garden nurseries and Condy's crystals potassium permanganate in water. Both of these give a strong colour that helps students to track the changes as they observe these substances dissolving.
Students should make some comparison about how this process has been different from their observation of melting above. Students can then dissolve substances in solvents other than water, such as eucalyptus oil and acetone nail polish remover.
This can be linked to the use of cleaning products around the house, which are designed to dissolve fats and oils. In order to consider the reverse of dissolving, pour small amounts of concentrated solutions like copper sulphate, salty water or shellac in methylated spirits into saucers and leave to evaporate.
Style: MLA. English Language Learners Definition of dissolve. Kids Definition of dissolve. Medical Definition of dissolve. Legal Definition of dissolve. Other Words from dissolve dissolvable adjective. Get Word of the Day daily email!
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