Effervescent Scarch Lab

Equipment- 250mL beaker, 125mL Erlenmeyer flask, cardboard square, chemical scoop, metric ruler, lab countertop, rubber stoppers, safety goggles, lab apron

Hypothesis: It was hypothesised the colder the water is, the slower the tablet dissolves and the hotter the water gets, the faster the tablet dissolves. This is due to the particles heating up and getting excited thus separating the particles faster. It was suspected that the 20°C tablet in water would finish dissolving at 6 minutes, the 40° would dissolve at 4 minutes and the 50° would dissolve at 2 minutes. Also it was suspected that the 30°C tablet in water would dissolve after 4 minutes and the 60°C would finish dissolving after 1 minute.

Step 4: Place the test tubes into separate coffee cups to maintain the upward position. Add 2 mls of the catalase solution to each of the test tubes and then place tubes1, 2, and 3 in the conditions described above. For test tube 4, fill the coffee mug half full of boiling

The materials used during the experiment included three plastic cups, three gummy bears, masking tape, marker, balance, calculator, tray, one plastic spoon, a measurement tray, and a ruler. The three plastic cups were used to hold the tap water, salt water, and sugar water. The masking tape and marker were used to label each cup with the

items presently in solid form in the lab kit or purchased separately for this laboratory

mL cylinder to the beaker on the stir plate and empty it into the beaker. Place the pH probe in the beaker and record the pH in the data table. Drag the beaker to the red disposal bucket. Double-click the bottle of NaHCO3 to move it to the Stockroom counter. Repeat steps 5 and 6 for KNO3.

Measure 500ml of tap water in the 500cm3 beaker, then measure 5g of sodium hydrogen carbonate using the 50cm3 beaker and weight scale and place in the beaker of water, using the glass rod to dissolve it into the mixture.

On average the Alka Seltzer tablet dissolved faster in hot water in comparison to ice cold water and room temperature water. The beaker with ice cold water caused the Alka Seltzer tablet to dissolve the slowest. The three beakers containing different temperatures of water, all produced carbon dioxide bubbles; however, the beaker containing hot water produced the bubbles more rapidly.

Alka Seltzer is a medical drug used for pain relief and used for relieving indigestion. For example, if you have a stomachache or some indigestion problems, Alka Seltzer may help neutralize the stomach acidity. Not only that, Alka Seltzer is also used for cleaning household items, such as vases or jewelry. Alka Seltzer contains citric acid and sodium bicarbonate, which makes it dissolve and release carbon dioxide gas when dropped in water. In this experiment, my lab partner, Rebecca, and I are trying to find a way to make Alka Seltzer dissolve faster in water. Rebecca and I both decide that if we increase the temperature of the water or make the water hotter, then the Alka Seltzer will dissolve faster because I know when salt and sugar dissolve in hot water, they dissolve faster. I predict that this same result would apply to this experiment.

This is because as the temperature increases, the water molecules start moving faster and faster- which leads to more collisions between the water molecules and the Alka-Seltzer molecules. The Alka- Seltzer dissolved fastest in the 110° water. When dissolving, the Alka-Seltzer produced a white fizzing substance. When the Alka Seltzer dissolved in higher degrees, the Alka dissolved completely into water. However in the lower temperatures, the Alka Seltzer dissolved but left gas bubbles at the bottom of the beaker.

For this experiment, there is several materials needed to have a successful lab experiment. This includes the basic utensils such as the datasheets, pencil, and a notepad to add additional notes. Following the list of materials, you will need three bottles to collect sampling water

3.Measure and add 0.5g, 1.0g, and 1.5g of sucrose into 3 of the test tubes. Do not add sucrose into the 4th test tube because this will be the control. Lightly shake the test tube to mix the contents together.

In this experiment, we investigate the change in temperature caused by adding a chemical substance into the water and dissolving it. The results recorded in the table below show that our hypothesis is correct.

Submerge the graduated cylinder in the plastic tub so that it is completely filled with water. Hold the open end of the graduated cylinder and move it vertically upside-down where the open end of the graduated cylinder is still submerged in the plastic tub. Clamp the graduated cylinder the ring stand of the lab table to keep it in place. perforate a hole in the top of the rubber cork for the solution container. Cut a straw the length of about four inches. place the straw inside of the rubber cork hole. Set up your timer for two minutes.

Carefully add all of the acid to the base in the calorimeter being careful not to splash any acid on the upper sides of the calorimeter. Stir the mixture gently with the thermometer observing the temperature every 15 seconds for the next 2 minutes. Seconds: 15s: 31, 30s: 31, 45s:31, 60s:31, 75s: 31, 90s: 31, 105s: 31, 120s: 31, 135s: 31