Calculating the pH of a Strong Acid or Strong Base
This video provides examples of how you can calculate the pH of a strong acid or strong base if you are given just the concentration (molarity) of the solution. I hope this is helpful!
Popular posts from this blog
Paramecium caudatum
This video shows a number of paramecium feeding on some algae. Paramecium are single celled organisms called protozoans which are common in pond water. Paramecium use tiny hair-like structures called cilia in order to move. Imagine a tiny boat with many oars moving in unison. Several other species of protists can be seen in this video. The video was shot with a hand-held HD camera using a cell phone mount created using a 3D printer with plans from Thingiverse .
Formula Units Determination for Magnesium Chloride
This video summarizes an experiment performed to experimentally determine the formula ulnits of magnesium chloride. In the lab the mass of a small sample of magnesium ribbon is measured. The metal is then placed into a beaker and concentrated HCl is added. When the reaction is complete the beaker is heated to drive off water and any unreacted HCl. Safety Note: This should be done in a fume hood to avoid breathing in any HCl fumes! After all the liquid has been removed from the beaker a precipitate of magnesium chloride is left behind. The mass of this compound is measured and compared to the original amount of magnesium to determine the added mass of chlorine. The data collected allows students to calculate the formula units of the magnesium chloride salt. The reaction is summarized by the following chemical equation. 2Mg + HCl → MgCl 2 + H 2 The compound forms with a 1:2 ratio of magnesium to chlorine. This is because magnesium has two valen...
Comments
Post a Comment