Eeva Medina is working in the research laboratory. She is performing a titration of 25.00 mL of sulfuric acid (H2SO4) solution of an unknow
Figure I shows the situation in a laboratory.
Figure I: Situation in a laboratory
Based on Figure 1, using the concept that you have discussed in lab safety, explain this situation and suggest the proper Standard Operation Procedure (SOP).
Eeva Medina is working in the research laboratory.
She is performing a titration of 25.00 mL of sulfuric acid (H2SO4) solution of an unknown concentration with 0.1031 M NaOH using phenolphthalein as an indicator.
The results are shown in
The volume of NaOH (cm3) Experiment Rough 1 1 Final reading (cm3) 12.60 25.00 37.30 Initial reading (cm3) 0.00 12.60 25.00
Prepare a full practical report and find the unknown concentration.QUESTION 3
As a student, you are required to experiment to prepare a wet mount of potato and locate the presence of amyloplast.
Outline the method used to get a clear image of the specimen while handling the microscope. Assumed that you have completed the experiment, prepare a full experiment report.
“Let food be thy medicine and medicine be thy food.” — Hippocrates Knowing what you eat is important!
Complete your task:-Take a picture of your favourite food, for example in Figure I. Then, insert the picture into the document. Look for the “Ingredient List” (English only), then snap a picture (Make sure it is clear, high clarity and readable). Then, insert the picture into the document. Make sure it has more than FIVE (5) ingredients in the “Ingredient List”, for example in Figure 2.
Assuming you are to test the presence of reducing sugar, starch, lipid, and protein in your favourite food in a well-equipped laboratory, demonstrate (in your own words) how you would carry out the experiment(s). Predict the results of your test based on the top FIVE (5) ingredients in the “Ingredient List”.
Case 1: All wishes to determine the density of a coin of 50 cents. In the experiment, he measures the mass and diameter of the coin of 50 cents by using a beam balance and ruler respectively. Suggest an action that can increase the precision of this experiment. Explain your answer.
Case 2: Abu repeats the measurement by using another object. He wants to measure the density of the other object by using the same apparatus that has been suggested in case 1. While conducting the experiment, he noticed that there is inaccuracy in the measurement.
Identify types of error and explain how these readings can be corrected.
By using the physics concept, apply other methods which can be used to determine the density of both objects in daily life. Explain your answer.