Purpose: To find out if the Unknown substances are bases or acids. Materials: goggles aprons paper for data table graduated cylinder unknown I substance beakers/test tubes stirring rod litmus paper pH indicator paper pH color chart phenolphthalein scoopula eye-dropper digital pH meter magnesium ribbon calculator unknown II substance forceps sodium bicarbonate Procedures: Test the pH of the Unknown substances with litmus paper and pH indicator paper and match to color chart
Premium Acid PH indicator PH
Amino acids are important building blocks; they play an essential role in the formation of proteins and as intermediates in metabolism. Amino acids can serve as cell signaling molecules and can regulate gene expression. An optimal amount of amino acids is essential for health. There are over 500 amino acids‚ however only 20 are commonly found. Amino acids all have an amine functional group and a carboxylic acid functional group. They differentiate from each other in their side chains. Only 10 of
Premium
samples against. Introduction Vinegar is a solution made from the fermentation of ethanol (CH3CH2OH)‚ which in turn was previously fermented from sugar. The fermentation of ethanol results in the production of acetic acid (CH3COOH). The typical pH of vinegar ranges anywhere from 2 to 3.5‚ although shop-bought vinegar usually measures 2.4 www.wisegeek.com/what-is-vinegar.htm fig 1 In this study we will determine the amount of acid in a vinegar sample by using titration‚ a common technique
Free Acid Base Titration
Acid Rain is a type of air pollution‚ which is formed when oxides of sulfur and nitrogen combine with atmospheric moisture to yield sulfuric and nitric acids‚ which may then be carried long distances from a source before they are deposited by rain. This pollution may also take the form of snow‚ fog‚ or a dry form of precipitation. Acid rain is currently a subject of great controversy because of widespread environmental damage‚ for which it has been blamed‚ including eroding structures‚ injuring crops
Premium Acid rain Oxygen Air pollution
Abstract The objective of this experiment was to observe multi-step purification of benzoic acid after performing the extraction from a mixture containing benzoic acid‚ cellulose‚ and methyl orange. Recrystallization was done to remove impurities from the sample. The amount of BA recovered during recrystallization is much less than the extracted amount of BA. The difference between the pure and impure samples was observed by comparison of melting points. It was found that impure samples will have
Premium Solubility Chemistry Temperature
Part A: Table 1: Fractionation of amino acid Fraction No | Response to Ninhydrin test(level of blue colour change) | Response to Sakaguchi test (colour change) | 1 | X | yellow | 2 | Dark blue | yellow | 3 | Dark blue | Pale orange | 4 | Blue | Pale orange | 5 | Pale blue | Pale orange | 6 | Blue | Pale orange | 7 | Pale blue | Pale orange | Discussion Part A In the separation and purification of a single protein or amino acids‚ a solution containing the desired analyte
Premium Amino acid Protein Acid
The acid-fast stain is performed on samples to demonstrate the characteristic of acid fastness in certain bacteria. Acid fastness is a characteristic that is shared by just a few organisms‚ so staining to determine if organisms possess this trait is useful in microbial identification schemes. The Ziehl-Neelsen method has endured as a reliable and effective way to demonstrate the acid-fast bacteria. Materials: 18-20 nutrient hour agar slant culture of Staphyloccus aureus 4 day old nutrient
Premium Bacteria Cell wall
In the face of adversity‚ the beliefs of an individual may be greatly altered‚ or even liquidated‚ leading to the lack of execution or bad behavior. Even if a person with strong beliefs and morals is put into a difficult and unexpected situation‚ they may completely and unwillingly disregard their beliefs and morals and act accordingly‚ or not at all. Around lots of people‚ when bystander apathy or diffusion of responsibility is present‚ the individual may be affected by it as well. In Night‚ Elie
Premium Person Psychology Bystander effect
Ahjaina Beard Mrs. Lewis IB/AP Language and Composition 11 November 2014 The Media and You The media draws the attention of millions of people around the world daily and with this major task the media displays positive influence onto its audience. When disasters happen the media is the first to let the people know what happened‚ how it happened‚ and lastly why it happened. Multiple sources prove the argument of the media positively playing a role on the effects of disasters. Everyone nowadays
Free Mass media Media studies Hazard
Title: Estimation of Ascorbic acid Aim: To determine the ascorbic acid content of canned apple and orange juice To determine the volume of canned juice necessary to provide 75mg of Vitamin C Introduction: For the estimation of ascorbic acid‚ the method used involved the titration of the ascorbic acid‚ in the presence of a redox indicator 2‚6-dichlorophenol-indophenol (DCPIP) which acts as both an oxidant so as to oxidise the ascorbic acid to dehydroascorbic acid‚ and it acts as an indicator
Premium Vitamin C Ascorbic acid Vinegar