<p>Can we start sharing ideas and thoughts? Let us share our knowlege about</p>
<p>1) Color of salts
2) Solubility laws
3) Flame Tests
4) Acid-Base Indicators - Mainly color changes
5) Typical lab qns - Collection of gas etc.
6) Any other state of matter questions related to electro neg, atomic radius etc.</p>
<p>If you have any other comments, please share them as well. I will start adding whatever I know.</p>
<p>1) CO2 gas collection - Heavy gas, use upward displacement method
2) O2 and H2 - Water displacement
3) Sodium Flame - Yellow
4) Potassium Flame - Violet
5) Calcium flame - Range Red
6) Barium Flame - Green</p>
<p>Great Idea. I was just looking at my Barrons book right now and the general rules of solubility came up so i’ll just write down what i have here.</p>
<p>General rules of Solubility
All nitrates, acetates and chlorates are Soluble
All common compounds of sodium, potassium and ammonium are soluble.
All cholroides are solubles excepts those of silver, mercury (1) and lead. The normal carbonates, phosphates silicates and sulfides are insoluble except those of sodium potassium and ammonium
All hydroxides are insoluble except those of sodium potassium ammonium barrium and strontium</p>
<p>Also Trends of solubility
Solid- Solubility usually increases with temperature. Pressure has little effect
Gas- Solubility usually decreases when you increase temperature. Solubility varies in direct proportion with pressure. Henry’s law
Pulverizing stirring and heating increase rate of solubility</p>
<p>Great Job DragonForce! Let us keep more coming. We need to look at some tricky state of matter qns (hybridization, VSPER, energy levels and subshells, and some reaction kinetics). For example, does catalyst impact rate of reaction including the slow step? Also the periodic table concept qns. The CB loves concept qns. How about some organic chemistry? Also some lab qns. What do we need and what do we don’t need. Errors introduced while doing dehydration of salts etc.</p>