Hydrochloric Acid Lab

The antacid each group added to their HCl solutions all increased the pH of the HCl to a certain degree. In order to determine the best antacid, the trial/antacid where the least amount of NaOH was added in order to turn the HCl solution pink needs to be identified. This tells which solution was the most basic before the addition of NaOH, and consequently tells which antacid increased the pH the most, making it the

4. Label three 500mL beakers with 1% NaCl and fill them with 400mL of the 1% NaCl solution. 5. Place one 10% NaCl cell into the 400mL of 50% NaCl solution. 6.

Tools used in this experiment include an electronic scale, a Mohr pipette, a micropipette, test tubes, a bowl of ice, a mortar and pestle, and a ruler. Materials needed include liver extract from bovine liver, water (distilled and regular), hydrogen peroxide, apple cider vinegar, baking soda, and pH paper. In order to achieve and determine our results, we prepared 6 test tubes, each with 2.0 mL of hydrogen peroxide (3% H2O2). We then added 2.0 mL of distilled water into 2 test tubes making that our controlled substance, 0.22g of baking soda into another test tube, 0.24g baking soda into a 4th test tube, and 8.0 mL of apple cider vinegar into the last test tube. The 2 test tubes with the baking soda were used as our basic solution and the 2 test tubes with the apple cider vinegar were used as our acidic solution.

Next prepare your analyte solution of acetic acid (unknown concentration). Use the 25ml measuring cylinder to measure out 25ml of acetic acid and carefully pour into the 100ml conical flask, then using the Pasteur pipette add 3 drops of phenolphthalein (pH indicator) to the acetic acid.

3: Using a graduated cylinder, measure 50 ML of vinegar. Pour the vinegar into a second plastic cup.

2. Two 1.033 and 1.041 grams of analyte were weighed and placed on the electronic balance with weighing paper and poured into the Erlenmeyer flasks. After the analyte was added, 15 ml of 3 M H2SO4 was added also.

After that, 0.1 ml of solution in Tube 4 was poured into plate 1A, the solution was spread over the surface evenly. These steps were repeated using 1ml from Tube 5 - plate 1B, 0.1 ml from Tube 5- plate 2A, 1 ml from tube 6 - plate 2B, 0.1ml from tube 6 - plate 3A, from tube 7 - plate 3B.

a 10-mL Erlenmeyer flask. Clamp the column in a vertical position, and close the valve.

Using a Pasteur pipette, add 1.0 milliliter (mL) of hot water drop-by-drop into the reaction tube to reach complete solubility of the solute

9. Acquire the syringe 2 to 3 mL of ethanol. Screw the syringe on the two way valve with it still closed, but don't put the flask in the water bath until told to do so. Also, repeat the LabQuest2 set up in Part A.

Return to the Stockroom. Click on the Solutions tab. Add the 3000 mL of Distilled Water container to the lab bench.

The phenolphthalein (acid-base indicator) were added into each antacid solution in order to determine the amount of NaOH dispensed for the solution to reach its neutralized point. As the solution turns slightly pink, it reached pass the neutral pH.

STEP 4: the first antacid was added ,drop by drop, to the first test tube, this was stopped as soon as the solution changed colour.A colour change meant that the Antacid had neutralised the acid in the lemon

Fill the buret with the NaOH solution above the 0.00 mL mark. Place a beaker under the tip and allow the NaOH solution to flow out until the volume is just below the 0.00 mL mark. Make sure the buret does not leak. If a leak occurs, inform your TA. Record the initial volume of the buret to two places to the right of the decimal. Replace the waste beaker with the Erlenmeyer flask containing solution of acidic soda. Make sure to refill the buret between 0.00 mL-2.00 mL of NaOH after each titration trial.

The balanced equation for this particular acid-base reaction is: . Knowing this equation will enable us to use molar ratios between the moles of NaOH and the HCl to find how much the antacid neutralized the HCl. Out of the four different brands of antacid used, Alcalak, Medi-First, Gelucil, and Alka-Seltzer, the most effective antacid would be the one that neutralizes the largest amount of HCl with the smallest antacid dose. Testing the effectiveness of the antacid is relevant in medicine today because it lets us know which antacid is better at neutralizing stomach acid, reducing heartburn, and/or other acid reflux symptoms.