Ph Values Lab Report

Purpose/Hypothesis: The purpose of this experiment is to use both cabbage juice and pH paper to determine the pH of household items. This way, we can tell which products are basic and which one are acidic. If we use cabbage juice as an universal pH indicator by comparing it to pH paper then pH determined by the cabbage juice will be unstable because by using cabbage juice, it can be different depending on how diluted it is.

The mole is a convenient unit for analyzing chemical reactions. Avogadro’s number is equal to the mole. The mass of a mole of any compound or element is the mass in grams that corresponds to the molecular formula, also known as the atomic mass. In this experiment, you will observe the reaction of iron nails with a solution of copper (II) chloride and determine the number of moles involved in the reaction. You will determine the number of moles of copper produced in the reaction of iron and copper (II) chloride, determine the number of moles of iron used up in the reaction of iron and copper (II) chloride, determine the ratio of moles of iron to moles of copper, and determine the number of atoms and formula units involved in

pH is also known as a measure of hydrogen ions in a solution. A hydrogen ion is the nucleus of a hydrogen atom being split from its electron. Studying the pH of different types of soil being placed in a control group such as tap water will represent the acidity or alkalinity of the matter. The pH scale begins at 0 and goes all the way up to 14, pH 7 being its neutral point, which isn’t acidic or basic. A neutral point on the acidic scale is in the middle, anything lower than the neutral point (7), is acidic, and anything higher than the neutral point is considered basic or “alkaline”.

Table 2: Consists of color extract taken from a red cabbage for a natural indicator. The pH reading that was measured by using the pH meter and the result of the pH reading to determine whether the solution was acidic or basic.

After extensive research, I believe that the more acidic the soil is, the slower it will be for the Fast Plants to grow. The soil’s pH is a crucial part in growing a healthy plant because “all plants require different levels for proper growth” (Lovejoy). The independent variable in this experiment is the Acidic buffer solutions; which consist of pH 2, 4, 6, and 7. According to Chemguide.co.uk, “An acidic buffer solution is simply one which has a pH less than 7.” It is very important that we as students understand the effects acidity has on plant growth. Studying the growth of the Wisconsin Fast Plant helps students have a firm understanding of this topic which in turn can help clean and prevent pollution throughout our country, making it a better and safer world for the

The problem that needed to be solved for this experiment was, “How are organisms able to survive and function with proficiency despite metabolic activities that have the disastrous ability to alter pH from a neutral to an acidic or basic environment?” This question needed to be answered by testing different biological materials, as well as tap water, in order to find out what allows modern day organisms to survive such hazardous conditions. A hypothesis that was formulated before experimenting was, “If type of substance is Tap Water, then the changes in pH will be more drastic because water, considered neutral on the pH scale, doesn’t contain a component that will prevent such a change, unlike the content of a buffer solution.” The independent variable for this experiment was type of substance, evidently because this was the part of the experiment that was constantly being changed from trial to trial. The dependent variable for this experiment was pH of the substance because the pH constantly changed depending on the type of substance was being experimented with. The control of this experiment was the tap water and buffer solutions, as the results of the data from the biological materials were constantly compared to the data from both of these solutions.

The pH of soil is important for the absorption of nutrients into the plant. Of the 17 needed plant nutrients 14 of them are acquired through the soil. Acidity is needed to break down and dissolve these nutrients. The nutrients are able to dissolve into the soil faster when the acid is acting as a solute. Another way the pH affects the soil is by influencing microorganisms. The bacteria is crucial in the growth and development of the plant, the bacteria’s role is to break down and decompose organic matter in the soil. If the pH of the soil is too high the acid will slow down and eventually stop the microorganisms. Most plants ideal pH is between 6-7, slightly acidic. Many plants are outliers and thrive in pH such as carrots and corn, which can withstand pH as low as 5.5. If the pH of the soil is too high for the desired crop farmers can add material such as limestone, and wood ashes to raise the pH to the desired level. The pH of the soil can also be changed naturally through the leaching of calcium, magnesium and sodium by rainwater. Carbon dioxide from rotting organic matter can also increase the pH of the soil. Acids can also be created organically in the form of sulfuric and nitric

The purpose of this lab is to determine whether or not acidic water affects the growth of red radish plants. Vinegar with a similar acidic pH as acid rain was used to water plants to simulate the effects of acid rain which is a current problem.. The pH used was 3.5. In comparison, the tap water was a pH of 7, a neutral liquid. By simulating acid rain and observing how the vinegar affects the plant, it will be possible to come to a conclusion about how acid rain may affect crops.

The soil averages to have a pH of 4.5-5.5 as there is low nutrients and Aluminum and Iron left behind and iron oxide giving the soil a reddish colour.

2. (5 pts) List and explain the names and affiliations of the various characters/stakeholders in this story – I’m looking for us to use the story to map out the complexities that are generally associated with solving public health puzzles – the stakeholders you list and explain here should apply to many of the cases we consider going forward.

2. When 2.00 g of NaOH were dissolved in 49.0 g water in a calorimeter at 24.0 ˚C, the temperature of the

pH measures the amount of acid and alkaline in water, and is measured on a scale from 0 (lowest) to 14 (highest). If the pH levels in your plant is about 7, or 7.1, it means that the levels of acid and alkaline are equal. If the levels are 8 and above, it means that the water has high levels of alkaline, and needs to be reduced. There are two systems that you can use to help maintain the pH levels. The first is a pH adjust treatment system, which adjusts and purifies the water automatically. The second system is a pH permissive system, which measures the pH levels in the water. This system sounds an alarm when the right levels are not reached. So, you will always be able to maintain the right water pH levels. Organizations that provide these

The intention of this experiment is to determine the effects of pH on the rate of photosynthesis in living leaves. Photosynthesis is a process by which plants convert light energy captured from the sun into chemical energy which they use to perform various plant functions. During the photosynthesis process, light, carbon dioxide, and water react to produce products: sugar and oxygen. The equation for photosynthesis is:

Low pH (4.6), the optimum level between 4.8 and 7.8 (CaCl2). Low because of the white clover

The peas grew best in pH3 acid, with a mean root length of 40.5mm, and the pH4 acid coming in second at 33.65mm. This also shows the pattern that the higher concentrations grow better then lower concentrations, with water growing better and worse depending on the plant.