Suppose you are a food chemist working for a company that makes and manufactures soda. Your job is to create a new soft drink wi
th the ingredients available to you. There is one problem—you need 1 liter of phosphoric acid solution, and the phosphoric acid available to use has a concentration of 0.01 M. This is much too high to add to your soda without distorting the flavor. Typically, there are about 45 milligrams of phosphoric acid per 12 ounce can of soda. Here is your task: Convert the 45 milligrams of phosphoric acid (H3PO4) into grams and then into moles.
0.00046 moles or 4.6×10-4 moles
Given that 12 ounces is equal to about 0.35 liter, find the molarity of the phosphoric acid in a typical can of soda (45 milligrams). 0.0013 M or 1.3×10-3 M
Using the dilution equation, determine how much of the stock solution (0.01 M H3PO4) you will need to make 1 liter of the concentration typically used in soda.
0.13 liter or 130 milliliters
Following are the possible isomers of secondary alcohol and ketones for six carbon molecules. In order to distinguish between sec. alcohol and ketone we can simply treat the unknown compound with acidified Potassium Dichromate (VI) in the presence of acid. If with treatment with unknown compound the colour of K2Cr2O7 (potassium dichromate VI) changes from orange to green then it is confirmed that the unknown compound is sec. alcohol, or if no change in colour is detected then ketone is confirmed. This is because ketone can not be further oxidized while, sec. alcohol can be oxidized to ketones as shown below,
1. weathering and erosion on Earth's surface is always breaking Rock down 2. Transport 3. Deposition 4. Compaction and cementation. 5. Metamorphism 6. rock melt
The quantity of heat energy (Q) required to raise the temperature of a substance depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)
Thus, Q = MCΦ
Given that,
Q = ?
Mass of water = 55.0g
C = 4.18 J/g°C
Φ = 65.0°C
Then, Q = MCΦ
Q = 55.0g x 4.18 J/g°C x 65.0°C
Q = 14943.5 J
Thus, 14943.5 joules of heat is needed to raise the temperature of water.