PH indicator

sodium hydroxide. The pH of gastric juice was then calculated and compared with the value determined by…

multiple trials with the macromolecules and test the pH levels throughout the course of the experiment. Materials and Methods The experimental design for our project was to simulate the digestion of carbohydrates, lipids, and proteins. We had set up trials for the pancreatic enzymes to break down these macromolecules and tested if macromolecule digestion had actually occurred, we also recorded the rate of their digestion by measuring pH levels. In trial 1 of our experiment we had simulated…

base. This reaction is known as neutralization. When an acid or base are neutralized, its pH level goes to 7 or neutral. On the pH scale, acids range from 1-6 and bases range from 8-14. An example of neutralization is when one mole of HCl and one mole NaOH are mixed to make table salt and water. The pH of water is 7, but salt does not have a pH and does not interact with water molecules.3 Therefore, the pH of the solution is 7, or neutral. To determine how much of a base is required to…

dissociate in water by the following reaction: i) HIn + H2O ⇋ H3O+ + In- The KIn value can be calculated from the reaction: ii) K_In=[H3O+][ In-]/[HIn] Taking the negative logarithm on both sides, iii)〖pK〗_In=pH+log⁡[HIn]/[〖In〗^- ] Solution sample of bromophenol blue with different but similar pH is put into spectrophotometer to find out the ratio of [HIn]/[In-] based on the Beer- Lambert Law1: iv) A=log⁡(l_t/l_o ) Where A is the absorbance of the sample, lt is the intensity of light passed…

change in pH of the non-renewable resources and leads to a destruction in the ecosystem. Specially in agriculture, crops cannot grow in acidic soil, so it is crucial to maintain the acidity of the soil at a neutral state. Consequently, farmers use lime fertilizers such as powdered limestone, CaO, or the ashes of burnt wood to neutralize the acid in the soil. However, considering that the change in acids…

grow at a very high speed rate. Their scientific name is Brassica rapa. Plants have enzymes, enzymes are special proteins that are essential for living organisms. Enzymes have preferred environments. “If an environment is too acidic (low pH) or alkaline (high pH) an enzyme won't function,…

Communication /6 Problem #2 Use the chart you just created to answer the following questions. a) Which substance would be the most corrosive? /1 Sample number 2 is the most basic and corrosive substance between the four samples. With its very high pH of 12, it can be predicted that sample number 2 is the oven cleaner that contains Sodium Hydroxide. Sodium Hydroxide (NaOH) is highly corrosive due to its elements; the presence of oxygen and an electrolyte (Sodium – Na) cause corrosion, the…

Volume of NaOH (mL) pH Volume of NaOH (mL) pH Volume of NaOH (mL) pH 0.0 3.0 26.0 5.1 35.8 7.3 2.9 3.6 28.9 5.4 35.9 - Eq. Point 8.0 5.9 3.9 30.9 5.6 36.0 8.8 8.9 4.2 32.9 5.7 37.9 11.1 11.9 4.4 34.9 6.2 40.0 11.4 14.0 4.4 35.1 6.3 41.9 11.6 16.9 4.6 35.4 6.6 43.9…

of corn oil was found to be 0.928 g/cm3 (Hodgman 1924). From these evidences, water shows that it has the highest density among three liquid. Overall, this experiment supported our hypothesis. Water was found to have good solvent abilities, neutral PH, high heat capacity, high surface tension; water was also found to be cohesive, adhesive, and denser. Some of these properties were not found on corn oil and ethanol, so it was supported that water is different from other…

chemicals with an acidic pH level are taken out of the atmosphere through precipitation. When we pollute the air by burning fossil fuels, we create different chemicals that end up in our atmosphere. A few of these have chemical reactions with the water in clouds, and form (depending on the chemical) sulfurous and nitrous acids. When it rains, this acid is taken back to the ground. While pure water has a neutral pH level of 7, even unpolluted water will have an acidic pH level of 5.6 due to…