PH indicator Essays

  • Acid Base Indicator Lab Report

    1098 Words  | 5 Pages

    Introduction: In this experiment acid base indicators will be tested, using a red cabbage mixture. Substances can be classified as acidic or alkalinic depending on the concentration of hydrogen or hydroxide ions. The higher the concentration of hydrogen ions the lower the pH this means it will be an acid and the higher the concentration of hydroxide ions the higher the pH this means it will be an base(science prof online). A pH indicator is a solution or mixture that changes colour in the presence

  • Bromothymol Blue Ph Enumeration Lab Report

    565 Words  | 3 Pages

    chemical indicator that is used to find acids and bases. It is mostly used to show the pH of fish tanks and pools, measuring from 6.0 (yellow color) to 7.6 (green to blue). In the first experiment we exhaled into the solution. As the carbon dioxide from our breath absorbed into

  • Lab: Titration Of The Unknown Acid

    628 Words  | 3 Pages

    concentration of the acid we used in class will be sampled with a standardize solution such as sodium hydroxide with an environmentally indicator to show the physical change of color that occurs to the solution by the acid. The equipment necessary for the titration experiment follows: 0.1M NaOH, Acid solution, Anthocyanin (which is found in red cabbage leaves) indicator, Burets, Ethanol 95% and DI water. First Professor Greenberg assign a labeled unknown acid solution, then we recorded the solution’s

  • Acetic Acid Concentration

    1479 Words  | 6 Pages

    calculated using the M 1 V 1 = M 2 V 2 relationship. It was then gradually added to the vinegar solution until the acid-base reaction was completely neutralized. To regulate the reaction, phenolphthalein, an acid-base indicator, was added beforehand to the vinegar (analyte). The indicator will change its color, signaling that the end point is obtained and the volume of NaOH used can now be

  • Unknown Acid Molarity

    1348 Words  | 6 Pages

    Introduction: The unknown acid molarity will be determining by titration method. Titration is a process depends on concentration of known solution to another solution until the solute in the another solution completely react. Standard solution is the solution of known concentration that used in titration. In this experiment, NaOH was the titrant (base) however, the two analyte which used were HCl and H2SO4. The chemical reaction equations are molecular and ionic molecular equation for (NaOH) and

  • H. Pylori Diagnostic Test

    1642 Words  | 7 Pages

    limitation of every diagnostic test to detect H.pylori.(1, 2) Test Principal Advantage Limitation Rapid urease test In the presence of H. pylori urease, urea is metabolized to ammonia and bicarbonate resulting in an increase in pH, which changes the color of a pH-sensitive indicator. Tests for active H. pylori infection; >90% sensitivity and specificity. Results are rapid (within 24 hours), and test is less expensive than histology or culture. Withhold H2RAs and PPIs 1 to 2 weeks before testing and antibiotics

  • Polyaniline Essay

    1104 Words  | 5 Pages

    Preparation of Polyaniline Solution. To obtain polyaniline solution, prepare 0.12M aniline solution by adding 2 ml of aniline into 200 ml of 1 M sulfuric acid. Start with 98% purity sulfuric acid, 10.8784 ml of 98% sulfuric acid is added to 200 ml distilled water to obtain 1 M sulfuric acid. 0.12 M aniline solution can be created by adding 2 ml of aniline and 200 ml of 1 M sulfuric acid. Refrigerated the solution for a night to let the polyaniline solution form nanotube structure. Preparation of

  • Allyl Iso Thiocyanate Lab Report

    760 Words  | 4 Pages

    spirit neutral to phenolphthalein indicator. • Phenolphthalein indicator solution. • Standard aqueous potassium hydroxide or sodium hydroxide solution 0.1N or 0.5N. The solution should be stored in a brown glass bottle and colorless. Procedure: 1. Mix the mustard oil thoroughly before weighing. 2. Weigh approximately about 5 to 10 g of oil sample in a 250 ml conical

  • Solubility Test Lab

    751 Words  | 4 Pages

    Abstract The purpose of this lab was to identify the unknown and find out which solution is solubility. The test was done to determine the identity of the compound include solubility test, flame test, formation of precipitate and last PH test. It was found that the unknown compound smell like chorine, was soluble in water. The flame test matches the color of calcium chorine indicating that the unknown compound contained chorine, also the anion test sodium chorine proved to be positive. Resulting

  • Balloon Blow Up Research

    503 Words  | 3 Pages

    experiment. The baking soda has a ph level of 9. Since the baking soda has such a high ph level it has a strong acid base.This research helps answer the question by knowing how the base will react to the different acids. The final topic, also in the experiment, is the importance of the materials. The acid with the lowest ph level will be the highest acid that works better than the other acids. Higher acids have more hydrogen ions. The baking soda base is a high ph and soaks up hydrogen ions. Based

  • Ionic Bond Essay

    1042 Words  | 5 Pages

    Unit 3: Formation of ionic and metallic bonds Key unit competence: Describe how properties of ionic compounds and metals are related to the nature of their bonding 3.1. Introduction  Activity 3.1 Look at the pictures above and answer the following questions. Record your answers and discuss them in your groups. 1) Observe carefully pictures A, B and C and suggest the similarity between them. 2) What can you say about the chloride and sodium ions in the pictures above? 3) What holds the chloride

  • Red Dye Concentration Experiment

    663 Words  | 3 Pages

    Summary Determining the concentration of a liquid can be a tricky process involving complex procedures if it were not for science’s ability to test a substance’s absorbency through spectrophotometry. The experiment was carried out to discover the concentration of Red Dye #40 in several common soft drinks. The samples of the dye were diluted, and tested using a spectrophotometer. The absorbencies of these samples were then recorded, and a standard line curve with the concentration equation and R2

  • Macroscopic Evidence Of Chemical Change Essay

    953 Words  | 4 Pages

    contact the iodine just ran but did not change color. Lastly I tested the starch on a piece of white bread. Immediately it absorbed the iodine but did not change color therefore there was not starch. 6. Red cabbage juice is a natural, universal indicator. When a solution of red cabbage is red to pink, it indicates that a solution is acidic. When it is green to yellow, it indicates that

  • Ionisation Of Amino Acid And Ph Lab Report

    254 Words  | 2 Pages

    Explain the relationship between the ionisation of amino acids and pH |Structural diagram of the neutral structure| |Structural diagram of positively charged structure| |Structural diagram of negatively charged structure| Explain how the form of an amino acid, whether positively charged, negatively charged or neutral, depends of the pH of the solution ? If you increase the pH of a solution of an amino acid by adding hydroxide ions, if this is done then the hydrogen ions will then

  • Erlenmeyer Lab

    404 Words  | 2 Pages

    First, the 250-mL graduated cylinder, 100-mL graduated cylinder, and the 10-mL graduated cylinder were observed to see the volume of the liquid in each one. Then, one digit further was estimated, and the results were recorded. After that, the 25-mL graduated cylinder and the 50-mL beaker were cleaned and dried. Next, their masses were measured on the scale, and the results were rounded to the nearest thousands decimal place. Subsequently, the Erlenmeyer flask was filled with 100 mL of distilled water

  • Motiva Reaction Lab Report

    851 Words  | 4 Pages

    Production diclofenac acid (DFA) by diclofenac sodium (DFS) hydrolysis DFA which yielded from DFS hydrolysis was characterized by FT-IR and DTA. Fig. 2 showed the information provided by the spectra FT-IR profile, which distinguished DFS from DFA. The DFA’s spectra showed a specific absorption peak at 3324 cm-1 which correspond to free OH stretching of a carboxylic group. Free acid was also presented as a peak at 1693 cm-1 associated with C=O stretch and 1157 cm-1 correspond to the C-O stretch

  • Freezing Point Depression Experiment

    912 Words  | 4 Pages

    Discussion: In this experiment, freezing point depression was used to determine the molar mass of three unknown solids. First, the freezing point of the mixture of ice and water was determined, as freezing occurs when both the solid and liquid phases pre-present together. The temperature when the ice and water mixture reached equilibrium was recorded. Then, the solution of the unknown solids was prepared and its freezing point was determined. Then the equation of molarity allowed the experimenters

  • Colorimetric Analysis Lab Report

    818 Words  | 4 Pages

    OBJECTIVE The objective of this experiment was to analyze and determine the unknown concentration of a protein solution by utilizing two different colorimetric techniques; Biuret and Lowry. The Biuret method was used with unknown #2 and the Lowery method was used for unknown #1. After the concentration of each unknown was analyzed (by Biuret or Lowry method), the alternate objective was to compare the results achieved by each method and to determine if the results from the approaches were consistent

  • Weak Acid Lab

    647 Words  | 3 Pages

    The starting volume of the NaOH in the buret was recorded before about 4 mL of the strong base was titrated into the weak acid solution. The final volume was recorded. A pH probe connected through Microlab was calibrated using buffer solutions of pH 4.00, 7.00, and 10.00. The calibrated pH probe was used in order to measure the pH of the titrated solution of the unknown weak acid. These same steps were repeated except 2 mL of the strong base were titrated into the weak acid solution instead of 4 mL

  • Cis 561 Unit 3 Assignment

    481 Words  | 2 Pages

    CIS 561 Homework #2 Hussain Ul Abideen 01617974 Question#1: Solution: State: (a,b) for liters in jugs 1 and 2 Integer 0 to 4 (a,b) : 0<= 7, Operations:- (set1) Shift black tile with blank tile which is next left to black tile, Shift black tile with blank tile which is next right to black tile, Shift white tile with blank tile which is next left to white tile, Shift white tile with blank tile which is next right to white tile