--- title: Mixing and dissolving — a lesson of Mova's school · trees and pragmatics description: «Mixing and dissolving», a lesson of the chemistry course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: Water molecules crowd round each tiny sugar molecule and carry it off into the liquid, so the sugar is still there, only spread out too small to s --- [Mova](https://md.mova.elamur.ai/free/en/) · [this page in HTML](https://mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/) [home](https://md.mova.elamur.ai/free/en/) / [corpora](https://md.mova.elamur.ai/free/en/corpora/) / [school](https://md.mova.elamur.ai/free/en/corpora/school/) / [Chemistry](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/) / Mixing and dissolving # Mixing and dissolving Lesson 6 of the chemistry course of Mova's primary school: 16 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0). How Mova does on its tests: [the lesson at school](https://md.mova.elamur.ai/free/en/school-run/chemistry/6-mixing-and-dissolving/). - [1](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/1/) — Water molecules crowd round each tiny sugar molecule and carry it off into the liquid, so the sugar is still there, only spread out too small to see. - [2](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/2/) — The sugar plus the water make a solution; let the water evaporate and the sugar comes back. - [3](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/3/) — Not everything dissolves: sand just sinks, and a glass of water can only hold so much salt before the rest settles at the bottom. - [4](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/4/) — Heat, stirring and small grains all make dissolving faster, which is why loose sugar vanishes before a sugar cube does. - [5](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/5/) — When something dissolves, its particles spread out among the water particles; it is still there and still has its taste. - [6](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/6/) — A dissolved solid can be got back by letting the water evaporate. - [7](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/7/) — Hot water dissolves sugar faster and can hold more of it than cold water. - [8](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/8/) — Water can hold only a certain amount of salt; after that it is saturated and extra salt settles at the bottom. - [9](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/9/) — The Dead Sea is so salty that people float on it like corks; salty water holds you up more than fresh water. - [10](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/10/) — Sand does not dissolve in water, because its particles are joined too strongly for water to pull them apart; nail varnish does not dissolve in water either, but it does dissolve in nail varnish remover. - [11](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/11/) — Small grains dissolve faster than a lump, because they have more surface for the water to touch; stirring helps too. - [12](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/12/) — Squash is a solution: more water makes it more dilute, and a sieve or filter cannot take the cordial back out. - [13](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/13/) — Gases dissolve in water too; fish breathe oxygen dissolved in the water, taking it in through their gills, and warm water holds less of it. - [14](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/14/) — A bath bomb holds a dry acid and baking soda that react only when water lets them meet, making carbon dioxide bubbles. - [15](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/15/) — Instant coffee is coffee liquid that was dried; ground coffee does not fully dissolve, so it needs a filter. - [16](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/6-mixing-and-dissolving/16/) — As sugar dissolves you can see wavy streams, because the sugary water bends light differently from plain water. - ← previous: [Melting, freezing, boiling and condensing](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/5-melting-freezing-boiling-condensing/) - next →: [Oil and water, and things that won't mix](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/7-oil-and-water/) - ↑ back to [Chemistry](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/)