INTRODUCTION: Acids Acids are any chemical compound that, when dissolved in h2o (water) gives a solution with the pH below 7.0. Acids are sour, they also destroy chemical properties of bases. Acids conduct an electrical current through them. Common Acids Acetic acid is found in vinegar. Vinegar is used for cooking things, treating jellyfish stings and pickling.
Experiment: Acids and Bases of Household Products Problem: Are these household products acids, bases or neutrals? Information Gathered: Acids have a high number of hydrogen ions but a low number of hydroxide ions. The pH of an acid range from 0 to 6.9 on the pH scale. Neutrals have an equal number of hydrogen and hydroxide ions. The pH of a neutral is 7.
In solutions that are more acidic than pH 3.2, it is protonated to form a red dipolar ion. Thus, methyl orange can be used as an indicator for titrations that have end point in the pH 3.2- 4.4 region. The indicator is usually prepated as a0.01% solution in water. In higher concentrations in basic solution, of course, methyl orange appears orange. Acid-Base Indicator Properties of Methyl Orange [pic] Procedure Pretreatment before Diazotization 1.
If the soil is too acidic - the most common complaint - it is treated with a base (chemicals opposite to an acid) in order to neutralise it. Common treatments use quicklime (calcium oxide) or chalk (calcium carbonate). Indigestion We all have hydrochloric acid in our stomach - it helps breakdown food! However, too much acid leads to indigestion. Therefore, to cure this ailment we need to neutralise the acid with a base such as, sodium hydrogen carbonate (baking soda), or an indigestion tablet.
By, solving the system of equations using linear algebra, the concentrations of the indicator and the conjugate base were determined. The Henderson-Hasselbach equation predicted that the pH for these solution plotted against the log of the ratio of the two species would yield a line whose Y-intercept equaled the pKa for methyl red. The value obtained was 4.96(1), which has a percent error of 1.9. Perhaps, if this were corrected for temperature there would be even greater agreement with the accepted value. INTRODUCTION The purpose of this experiment was to determine the pKa of an acid-base indicator (methyl red).
While some are condemning traditional bottled water, some are busy purchasing alkaline water machines. From personal experiences and from observation of others it is no secret that many people have too much acid in their body, which results in many diseases and ailments. Bad Diets: fried food, soft drinks, sucrose and other sugars build up acid salts in the body. Stress both psychological and physiological, can also form acid deposits in the body. It is said that the body uses the circulatory system to dispose of wastes; these are removed in liquid form, and are often deposited in the lungs and kidneys.
Most differential stains have a challenge step that follows staining with a primary dye. In the Gram stain the challenge step is a rinse with either ethanol or acetone (either may be used). This step dehydrates and tightens the cell wall of Gram positives (mainly peptidoglycan) such that the rinse does not enter the cell. Gram negatives have mainly a lipid cell wall (even though they do contain peptidoglycan) that allows the challenge rinse to penetrate the cell and rinse out the crystal violet-iodine complex rendering the Gram negative cell colourless. Thus, the Gram negative cells must be stained to be seen, and this is done with the counter stain.
In the body this compound is an antiviral, antibacterial, and antiprotozoal monoglyceride that destroys lipid coated viruses such as HIV, herpes, cytomegalovirus, and influenza. Lauric Acid is also used in cosmetics and industrially as a booster for soaps and detergents. Because lauric acid has a non-polar hydrocarbon tail and a polar carboxylic acid head, it can interact with polar solvents as well as fats, allowing water to dissolve fats. This accounts for the abilities of shampoos to remove
The purpose of heating the agar plates in the autoclave prior to inoculating them with microorganisms was to make sure that the lab results were exact. The plates might have not been properly cleaned beforehand or the bacteria in the air/where they were stored might still lay on the plate. Due to those bacteria the lab results might have turned out differently because we cultured different bacteria from places we did NOT swab. To prevent this we must sterile the plates. Bacteria dies at high temperatures so the plates were heated to kill off any lingering bacteria that may have been present on the agar plate.
Maya Chamseddine 9m3 Mrs. Anwar science It might be said: Introduction: Indicators are used to test alkalinity and acidity of various items. These items may be present as either an acid chemical solution, basic chemical solution or a neutral chemical solution. Acidic solution meaning any item with a high PH, connoting potential hydrogen, neutral meaning nor a high or low PH and base meaning an item with a low PH. We use a PH scale to measure the concentration of acidity and alkalinity in a chemical solution. It is determined that acids tend to loose their potential hydrogen easily whereas bases are more than likely to hold on to their hydrogen.