Lab Report: Ph

Lab Report pH Name _________________________________________________________ Materials Needed You will need the pursual materials for this lab. Red pinch Coffee filter or paper towel Container for water supply (at least 250 ml or 1 / 2 pint) Three transparent forms (about 100 ml or 3 ounces) or some other similar containers Hot water (e. g. , from a faucet, heated in a microwave oven, etc. ) Thermometer Vinegar Baking soda Safety goggles Tongs or fork Eyedropper or boozing straw Craft present or toothpick Extra sticks or drinking straws for stirringHypothesis In this lab, you will canvass the pH ranges of vinegar and a solution of water and baking soda. Do you think vinegar is an caustic or a base? What about the baking soda? Write down your hypothesis now. procedure Carry out the following steps to complete this lab. 1. Peel off several red snare leaves and tear them into pieces about 2. 5 cm (1 inch) square. Place the red cabbage pieces into the container. 2. Cover the cabbage pieces with juicy water (not boiling water) and soak for about 30 minutes.As a safety precaution, use the thermometer to make sure that the temperature of the water is not higher than 50 degrees Celsius (about 125 degrees Fahrenheit). KCDistanceLearning 3. With tongs or a fork, remove and discard as many cabbage pieces from the container as you can. 4. Carefully pour the be cabbage water from the larger container through the coffee filter into the three smaller cups or other transparent containers. 5. point out the purplish or dark blue chroma.If the cabbage water has a pH of about 7. 0, which is typical for plain tap water, the color will be more purplish. If your water is tempered by a water supply facility, it may have a pH around 8. 0, resulting in a dark blue color. This water color is your service line. You will be comparing other colours to this as you proceed. 6. Use a drinking straw or eyedropper to transfer vinegar from its container to one cup o f cabbage water, five drops at a time.Stir the cabbage water after each vinegar transfer. position any color change. Continue transferring vinegar five drops at a time until the color of the cabbage water has changed to a color different from that of the original cabbage water. 7. Use a craft stick or toothpick to transfer baking soda from its container to another cup of cabbage water, just a hardly a(prenominal) grains at a time. Stir the cabbage water after each baking soda transfer. Note any color change.Continue transferring baking soda a few grains at a time until the color of the cabbage water has changed to a color different from that of the original cabbage water. 8. The THIRD cup is your baseline cup. If you tap water is neutral, its color should be mostly purple, but it may be more aristocratic if your tap water has been treated by your county or city water supplier. 9. Record the color of the water after your final additions of vinegar or baking soda. What pH does each color represent? Is vinegar an acid or a base?How about baking soda? Observations/Data Record the observations and/or data you collected here. KCDistanceLearning Lab Evaluation What strengths and weaknesses did you find in the observational design? Is there anything you would do differently next time? How, if at all, would you do the experiment differently if you were to do it again? Discussion After you complete your lab, discuss your results in the course discussion board. ingeminate the responses to your discussion here. KCDistanceLearning