Acid Rain on Growing Plants The pH scale is used to test the acidity of a solution. It ranges from zero to fourteen. The solution is neutral at seven. Zero to six is considered acidic on the pH scale. Plants grow better in a neutral substance and slightly acidic water.
Chemistry Solutions & Suspensions Project Acetic Acid (Ethanoic Acid) Acetic Acid is a type of acid that is the main component of vinegar, with the chemical formula of CH3COOH. It is colourless and has a sour taste. Despite its status as a weak acid, it is corrosive when concentrated. Apart from being used to produce household vinegar, it is also used to produce Polyvinyl Acetate for wood glue and Cellulose Acetate for photographic film, together with various other synthetic fabrics and fibres. Its esters are also used as solvents for inks, coatings and paints.
The average was 4.92 which is pretty close comparably to the standard. B. Why is it better to use white vinegar rather than dark vinegar for this titration? White vinegar is better to use due to the fact that it contains only acetic acid and water where other vinegars contain more chemicals. C. Write a balanced equation for the neutralization of acetic acid with NaOH.
Red Cabbage Indicator Lab Objective: The objective of this lab is to determine the approximate pH of household solutions by using a red cabbage as an indicator solution. Research: A red cabbage contains a pigment molecule that is called flavin. When placed in very acidic solutions, the anthocyanin in the flavin will turn a reddish color. In neutral solutions, the color stays purple. In basic solutions, the solution will turn greenish-yellow.
Alkalinity can be defined as the capacity to neutralize acids. Carbonates (CO32-) are a major constituent in natural water that helps it behave as a buffer. Acid rain can reduce the alkalinity of water and hence would decrease its pH. In this experiment, water sources that measure pH below 5.6 will be considered acidic precipitation. Water from a variety of sources that receive precipitation is being sampled.
Radu Purtuc | Chemistry 231 - Lab | Section 32 Ronnie :: team-member TECH 705, SEPARATING ACIDS AND NEUTRAL COMPOUNDS BY SOLVENT EXTRACTION - MACROSCALE EXTRACTION July 6, 2006 Lab Report INTRODUCTION Purpose: using extraction technique to separate acetanilide, p-toluic acid, and p-tert-butylphenol; then measure the melting points of each compound and comparing them to the statistical values. Background: separating acids and neutral compounds by solvent extraction is a useful technique used in practice by chemists to separate organic compounds from mixture of other compounds. It generally involve several steps, with limiting factors being the number and output purity of compounds to be extracted from source mixture. A number of specific compound solvents not inter-miscible are used to separate and dissolve compounds, and a physical transfer between solvents is employed. An example of use is cleaning compounds of impurities, where different solvents work as a molecular filter that interacts differentially with compound and impurities respectively.
CHE 111 Laboratory 3 Hydrates Introduction Hydrates Water molecules combine with the molecules of certain substances, forming loose chemical combinations called hydrates. An example of a hydrate is MgSO4•7H2O. This formula means 7 water molecules are loosely attached to a magnesium sulfate molecule. Other examples of hydrates are Na2SO4•10H2O and Ba(OH)2•8H2O. When the hydrate is heated, it easily loses water molecules attached and becomes an anhydrous salt.
In some other cases excess heat may result in a different product other than what is expected. Vinegar is a weak acid with a pH of 2-3. Vinegar is a mixture of about 5% acetic and water with a small amount of other flavoring and coloring chemicals which depends on the method of production. eg. balsamic vinegar, apple vinegar, brown vinegar and white vinegar.
The temperature of the water does matter in my opinion. If the water is hotter is it easier for the molecules to moves, like we seen in our beet lab from week two. If we uses say lemonade verses water I think the outcome would be completely different. I do think a person mood could affect this experiment. Reason being if someone was upset they could do something wrong by not paying attention, or if someone is angry they could be careless and put too much dye into a glass.