Can't+Judge+a+Powder

​ Can't Judge a Powder.

Work done of 11/5/09 that Nadia and Alison and Will Fine grains Smooth grain shape High luster Clumping Possibly hygroscopic

Granule- one of numerous particles forming a larger unit Powder-   matter    in a finely divided state: particulate matter Crystal- a body that is formed by the solidification of a chemical element, a compound, or a mixture and has a regularly repeating internal arrangement of its atoms and often   external    plane faces

Assignment for 11/5:

Take a look at this: []

Look at the following image of a powder. Just by looking at it, type out your observations. __Everyone__ should contribute something to the observation, I don't want Will doing it all by himself again. This is not a solo event. (Hint: color, shape, size of crystals, and luster are important visual characteristics) When you are done, post your observations on the wiki.



Defined. Electrolyte-a substance that, when dissolved, becomes a conductor Endothermic-a reaction absorbing heat Exothermic-a reaction giving off heat Hydronium ion-H3O Hydroxide ion-OH - Insoluble-cannot dissolve in a liquid Unsaturated-capable of absorbing more of something Saturated-unable to absorb more of something at a given temperature and pressure Supersaturated- containing an amount of a substance greater than that required for saturation


 * 11/4/09**
 * Colloid – semi soluble **
 * Soluble – can be dissolved in a liquid **
 * Solute – dissolved substance **
 * Solvent – a substance capable of dissolving things in it **
 * Solution – solid mixed with liquid **
 * Solubility – the quality of being soluble **
 * Hydrophilic – soluble in water **
 * Hydrophobic –not soluble in water **

Go through the [|Powerpoint] provided by the event supervisor, to familiarize yourself with the event. Focus on the difference between making an observation and making an inference. You can lose points if you make inferences on the test.
 * 11/3/09**