5. Place the small plastic bag inside a larger Zip-lock baggie. 6. Surround the smaller bag with a few cups of crushed ice. 7.
3. Then, measure the amount of time it takes the ice cube to melt inside the household ice box. 4. Repeat by adding a new ice cube with salt, sugar, and so on. 5.
from the penny. * Dry the penny and retest x4 * Determine the number of drops of Chocolate milk it takes to fill a penny, holding the eye dropped 2 cm. from the penny. * Dry the penny and retest x4. * Calculate data.
Materials: 3 beakers Thermometer 3 Alka-Seltzer tablets Stopwatch Mortar and pestle Source of hot water Ice cubes Graph paper Procedures: Hot water- Run water from the hot tap until it is hot as possible Fill beaker with 80 mL of hot water Use thermometer to take temperature of water. Record in data table. Remove 1 Alka-Seltzer tablet from package Drop into the water. Measure the time it takes for the tablet to completely dissolve. BE READY WITH THE STOPWATCH.
Using another 125-mL flask, 60-mL of 0.3622 M potassium hydroxide in ethanol was deposited. Both flasks were clamped in a temperature-controlled bath regulated at 50.0˚C. The solutions were then set in the temperature bath for ten minutes to equilibrate. An empty 250-mL Erlenmeyer flask was also clamped in the same water bath. In another flask 50-mL of ice water was deposited with three-drop phenolphthalein.
| | Ingredients | 1 12 oz bag chocolate chips (d iry & nut-free) 1 1/2 cups dried cherries (about 1 1/2 5 oz bags) | | Instructions | Put chocolate in glass bowl. Microwave until melted, checking and stirring after each minute. This will take about four minutes. Put cherries into melted chocolate, and stir until all mixed together. Put waxed paper on a cookie sheet.
If the frosting starts to set then put it back over the pan of water for a couple of minutes, stirring until it becomes smooth again. * Spread over the remaining frosting over the top of the cake and then cover with sprinkles. * If you prefer a cake with slightly firmer frosting (like I do), then place the cake in the fridge for 15 minutes before serving. * Serve and
A) How many mosm solute will 1 gram of NaCl yield? Show your calculations. (1gNaCl/1)*(1000mg/1gNaCl)(2/58mg)=34.5mOsm. 3. Mixed Solutions: If 1 mmole of glucose (180mg=1mOsm) and 1 mmole of NaCl (58mg=2mmOsm) are put into a beaker and distilled water added to make 1 liter, the osmolarity is 3 mOSm/L.
8. Slowly pout the ice-cold alcohol into the tube until the tube is half full and forms a layer over the top of the strawberry extract. 9. At the interface, you will see DNA precipitate out of the solution and float to the top. You may spool the DNA on your glass rod or pipette tip.
b. For ice water, add 7 ice cubes and fill the pyrex measuring cup to 8 oz of water. Let it sit for a minute. c. For very hot water, fill the pyrex measuring cup with hot water and put it in the microwave for 1 minute. 2.