A) B) C) D) E) ____ 3. An aqueous solution of potassium chloride is mixed with an aqueous solution of sodium nitrate. The net ionic equation contains which of the following species (when balanced in standard form)? A) B) C) D) E) No net ionic
6) Which amino acid has the highest Rf value. Why? Phenylalanine has the highest Rf value because it is the most non-polar and therefore has the lowest affinity for the polar stationary phase. 7) Which amino acid has the lowest Rf value. Why?
The pH optimum? How would you classify the phosphatase activity found in your extract? The temperature optimum was 55 degrees Celsius. The pH optimum was 5. The phosphate activity found in our extract would be acidic because the pH is low.
It was found that fecal coliform and dissolved oxygen were rather unhealthy, comparatively speaking. The overall water quality index was 72.03, which was lower than expected. After researching, it was inferred that the tests came back low because the first half of the tests were taken in highly contaminated water. This is most likely what swayed the averages, causing the water quality index to be very low. Introduction Sope Creek is located in Marietta, GA, and is the test site of recent water quality index tests.
The concentrations of OH- and Ca2+ were used to calculate the solubility product constant. For the solution containing Ca(OH)2, in pure water the concentration of the OH- ion was 0.06M and the concentration of the Ca2+ ion was 0.03M. For the solution containing Ca(OH)2, in NaOH the concentration of the OH- ion was 0.056M and the concentration of the Ca2+ ion was 0.028M. The solubility product constant was determined to be 1.8x10-4 for the solution of Ca(OH)2, in pure water and the solubility product constant for the solution of Ca(OH)2, in NaOH was determined to be 8.8x10-5. The solubility of the solution containing Ca(OH)2 in NaOH had a smaller solubility of 4.15 g/L than the solution containing Ca(OH)2 in water, which had a solubility of 4.45 g/L.
A. II only B. III only C. II and III D. I only 6. A hydrate is a A. buffer solution of water B. compound in which hydrogen is combined with an element less electronegative than itself C. compound containing a definite number of water molecules in its chemical composition D. salt containing the hydroxyl radical 7. Two moles of hydrogen react with 1 mole of oxygen to produce which of the following? A. 1 mole of water B.
ABSTRACT Isopropyltoluene isomers were synthesized through the friedel-crafts alkylation of toluene with 2-chloropropane in the presence of aluminum chloride as a catalyst. Through extraction of the distillate with water and 5% NaHCO3, followed by a fractional vacuum distillation, the desired aromatic organic compound was isolated. Infrared Spectroscopy and Gas Chromatography were used to analyze the composition, purity and to confirm the identity of the prepared product. The sample weighed approximately 2.66g, which reflected a low yield at 47%. However, from the GC the area % (also known as percent purity) was 91.8%, which indicates that a very pure product was obtained.
Since vinegar is an acid, you know that vinegar was not in the solution and it must be something else. You decided to investigate if the new wave of Vitamin Water is pH neutral: neither too acidic nor too basic. Using BTB (bromothymol blue), you select five flavors of Vitamin Water to rest. Three of the flavor-samples turn a murky green, indicating the likelihood of acid/base balance. Of the two remaining, one turns slightly yellow, while the other remains blue.
Blood is basic on the pH scale. The most acidic substance on the pH scale is probably battery acid, which is toxic. Citrus fruits can be ranged on the pH scale as two to three. Tomato juice is an example for four on the pH scale. Black coffee is an example of five on the pH scale.
Acids (low pH) range from one to six on the scale, while bases (high pH) range from eight to 14 on the scale. A pH of seven is considered neutral, like pure water. pH stands for "potential for hydrogen ion concentration" and refers to the amount of hydrogen ions in a solution. The more hydrogen ions, the lower the pH. The fewer hydrogen ions present, the higher the pH.