Tuesday, April 15, 2008
Tues-Day 2
Bio- we had our unit exam today; tomorrow we begin the most important unit in Biology: Evolution. The modern synthetic theory of evolution is the SINGLE unifying theory of ALL of biology. Everything that we studied this year can be explained and connected via this theory.
I look forward to discussing it with you.
Chem 7/8- we discussed another unit of concentration that is commonly used to measure minute quantities of pollutants dissolved in aqueous solutions or in air: parts per million (ppm).
We then looked at a table of solubility curves to determine the quantity of various solutes that can saturate (be dissolved in) 100. grams of water to make an aqueous solution at various temperatures. Frequently, proportions must be used in order to solve these problems because many solutions contain more or fewer than 100. grams of water.
We also saw how to tell whether a given solution is unsaturated, saturated, or will form a certain amount of precipitate. Occasionally, even an unstable supersaturated solution can form. ONLY saturated solutions are at equilibrium i.e. the rate of dissolving EQUALS the RATE of crystallization/undissolving.
We then tested our precipitate Bingo grids by doing a microscale mixing of pairs of aqueous solutions in order to see whether the double replacement reaction occurred.
Chem 9- we discussed another unit of concentration that is commonly used to measure minute quantities of pollutants dissolved in aqueous solutions or in air: parts per million (ppm).
We then looked at a table of solubility curves to determine the quantity of various solutes that can saturate (be dissolved in) 100. grams of water to make an aqueous solution at various temperatures. Frequently, proportions must be used in order to solve these problems because many solutions contain more or fewer than 100. grams of water.
We also saw how to tell whether a given solution is unsaturated, saturated, or will form a certain amount of precipitate. Occasionally, even an unstable supersaturated solution can form. ONLY saturated solutions are at equilibrium i.e. the rate of dissolving EQUALS the RATE of crystallization/undissolving.
I look forward to discussing it with you.
Chem 7/8- we discussed another unit of concentration that is commonly used to measure minute quantities of pollutants dissolved in aqueous solutions or in air: parts per million (ppm).
We then looked at a table of solubility curves to determine the quantity of various solutes that can saturate (be dissolved in) 100. grams of water to make an aqueous solution at various temperatures. Frequently, proportions must be used in order to solve these problems because many solutions contain more or fewer than 100. grams of water.
We also saw how to tell whether a given solution is unsaturated, saturated, or will form a certain amount of precipitate. Occasionally, even an unstable supersaturated solution can form. ONLY saturated solutions are at equilibrium i.e. the rate of dissolving EQUALS the RATE of crystallization/undissolving.
We then tested our precipitate Bingo grids by doing a microscale mixing of pairs of aqueous solutions in order to see whether the double replacement reaction occurred.
Chem 9- we discussed another unit of concentration that is commonly used to measure minute quantities of pollutants dissolved in aqueous solutions or in air: parts per million (ppm).
We then looked at a table of solubility curves to determine the quantity of various solutes that can saturate (be dissolved in) 100. grams of water to make an aqueous solution at various temperatures. Frequently, proportions must be used in order to solve these problems because many solutions contain more or fewer than 100. grams of water.
We also saw how to tell whether a given solution is unsaturated, saturated, or will form a certain amount of precipitate. Occasionally, even an unstable supersaturated solution can form. ONLY saturated solutions are at equilibrium i.e. the rate of dissolving EQUALS the RATE of crystallization/undissolving.
# posted by C @ 2:46 PM 
