Place the thermometer through the lid and record the temperature of the water, Tinitial. 7. Add the NaCl powder into the Styrofoam cup by removing the lid and quickly start the stopwatch. Place the lid back on the Styrofoam cup. 8.
Remove the plunger from the syringe barrel and place the ten leaf discs into the syringe barrel. 10. Place the plunger back into the syringe barrel then carefully push the plunger down until there are 3cm3 of air are left inside (make you sure no leaves are crushed) 11. Pull 5cm3 of Sodium hydrogen carbonate into the syringe. In the case of the leaf discs being stuck on the sides of the barrel, tap the syringe to suspend them in the solution.
Approximately 2 gm, nearest to 0.1 mg, oven dried cornhusk fibres, were weighed out accurately in weighing bottle and transferred to a 100 ml beaker. 40 ml of cold (10-15˚C) 72% sulphuric acid was added gradually to the fibres in small increments while stirring the mixture and macerating the fibres with a small glass rod. The beaker was kept in a bath at 2 ± 1˚C for dispersion of material. After the specimen was dispersed, beaker was covered with a watch glass and kept in a bath at 20 ± 1˚C for 2 hours. Mixture was stirred frequently to ensure complete
A 10cm string is used to tie the balloon on mouth of bottle so that air may not intrude and no air formed be lost. Then the balloon is lifted up so that the baking soda runs into bottle to react with the vinegar inside. Immediately the balloon is inflated by the carbon dioxide formed. The baking soda is kept constant when the experiment is repeated for another different amount of vinegar. Results/Findings When sodium bicarbonate and vinegar mix,
Put the caps on the bottles and shake them until all the sugar is dissolved. Testing the Sugar Solutions All of the solutions should be the same temperature before testing Place the hydrometer in the 0% sugar bottle, record your reading in your notebook Repeat this step for the 5%, 10%, 15%, 20% and 25% sugar solutions. Rinse and dry the hydrometer between readings. Testing the Soda and Iced Tea Place the hydrometer in soda 1(coke). Record the value on the hydrometer in your notebook Remove the hydrometer and rinse and dry
Cranberry, Orange & Ginger Punch Ingredients: 1 package (12 oz.) frozen cranberry juice concentrate 3 cups water 1 liter orange juice, chilled 2 liters dry ginger ale, chilled 2 cups ice cubes 2 oranges, segmented Directions: * In a large punch bowl, combine juices. * Add chilled ginger ale and mix well. * Add ice cubes and orange segments just before serving. How to segment an orange: Peel orange and remove as much white pith as posible.
This also relates to the experiment performed above because it also affects how fast the rate of reaction is. Like how the temperature affected how long it took for the tablet to react to the water, if there is only one drop water used to dissolve the whole tablet, the time it takes for the whole tablet to react to the water and start to dissolve will be
After cooling, the flask was weighed in an analytical balance. The experimental molar mass was 45.56g, which is closely identical to the 46.068g of the molar mass of ethanol. The percent error between the two values is 1.10%, the probable sources of error are the following: the size of the tiny hole in the aluminum foil, measurement of the temperature in the thermometer, and measurement of the initial volume of the flask. The recommendation for the experiment is to dry the flask completely before measuring the initial mass and to closely observe if the temperature of the water bath is