Chemistry Experiment Double Indicator Titration 1 Aim The purpose of this experiment is to find the composition of a sample of sodium carbonate mixture by titration. Introduction The reaction between sodium carbonate and hydrochloric acid occurs in 2 stages‚ with the formation of hydrogen carbonate ion as the intermediate product. Na2CO3(aq) + HCl [pic] NaHCO3(aq) + NaCl(aq) NaHCO3(aq) + HCl(aq) [pic] NaCl(aq) + H2O(l) + CO2(g) [pic] Requirements Hydrochloric
Free Titration Laboratory glassware PH indicator
& Dependent variable: Definition: Independent variable: The action we are going to do in the experiment Dependent variable: What is being measured Independent & Dependent variable in the experiment: Independent variable: Using chemical indicators to determine which is the monomer and the polymer. Dependent variable: Color change Data and observations: | Before |
Premium Polysaccharide PH indicator Orange
Carbohydrate fermentation: 1) Phenol red lactose broth. 2) Phenol Red Glucose broth. 1) Phenol red lactose broth test This test is used in order to indicate whether the organism can use lactose as the source of energy or not. Phenol red indicator also added in the broth. In this experiment the color remained red and didn’t change which makes the test negative. It means that the organism didn’t ferment with phenol red lactose (PRL). 2) Phenol Red Glucose broth test In this test if glucose
Premium Gram staining Bacteria Enzyme
everyday. What are some examples of pH indicators? Red Cabbage Indicator‚ would be known as a natural indicator. When boiled‚ it can be used to determine acids‚ basics or neutral items/products. Litmus Paper is another indicator and is known as a synthetic indicator. This also helps determine acids‚ basics and neutral items/products. Explain the process of how to measure the pH of the acid or base using indicators. 1. Collect a spotting tile 2. Place drops of the different
Premium Acid PH PH indicator
50% w/v NaOH solution (50 g in 100 cm3 solution) Eriochrome Black T indicator pH 10 NH3 - NH4Cl buffer Hydroxynaphthol blue indicator 0.01 M EDTA (disodium salt) Safety Equipment Enclosed footwear Laboratory coat Safety glasses Rubber gloves Method Part A: Determination of total hardness 1. Pipette 50 cm3 mineral water into a conical flask. 2. Add 2 cm3 buffer solution followed by 3 drops of Eriochrome Black T indicator solution. 3. Titrate with 0.01 M EDTA until the solution turns from
Premium Calcium Hard water Water
taking broad view of HR’s value chain. Just as a corporate scorecard contains both leading and lagging indicators‚ the HR Scorecard must so the same. Of the four HR architecture elements that we recommend including in the Scorecard- High Performance Work System‚ HR system alignment‚ HR efficiency‚ and HR deliverables- the first two are leading indicators and the second two are lagging indicators of HR performance. The following illustration gives you a basic idea of how Hi-Tech’s R%D HR Scorecard
Premium Strategic management Decision making
Ferric ions à Ferrous sulfide (black precipitate) Phenol red (ph indicator) Alkaline slant/Alkaline butt (K/K) NO FERMENTATION NOT MEMBERS OF ENTEROBACTERIACEAE Stab and Streak GLUCOSE FERMENTATION ONLY Alkaline slant/ Acid butt (K/A) 18-24 hrs incubation Acid slant/ Acid butt (A/A) 8-12 hrs incubation Acid slant/ Acid butt(A/A) 18-24 hrs incubation LACTOSE (SUCROSE) FERMENTATION H2S PRODUCTION Indicators: Sodium thiosulfate Ferrous sulfate (+) black color/black precipitate
Premium Hydrogen sulfide PH indicator Bacteria
Report Introduction The purpose of this lab is to use volumetric analysis to determine the concentration of unknown substances. A sodium hydroxide solution is standardized to assist in finding the concentration of an acetic acid. An indicator must be used to pin point the equivalence point‚ the point in which 1 mole of a substance is equal to 1 mole of another. When that is found‚ we can determine the concentration. HC2H3O2 (aq) + NaOH (aq) H2O (l) + NaC2H3O2 (aq) The above equation
Premium Titration Sodium hydroxide PH indicator
dichromate. The standardized potassium dichromate will then be used to titrate the unknown iron sample using the indicator p-diphenylamine sulfonate. The standardized potassium dichromate which has a concentration around 0.017 M is then titrated into the unknown iron sample which is dissolved in deionized water. The unknown sample is titrated to its end point using the indicator p-diphenylamine sulfonate‚ the acid mixture helps to make the end point sharper which would make it more accurately
Premium Sulfuric acid Titration Phosphoric acid
Mg(OH)2 in Milk of Magnesia‚ etc. You will learn to prepare samples of a specified concentration‚ learn about acids and bases through the use of titrations and learn how to detect endpoints using different indicators. You will become adept at measuring pH with both a pH meter and indicator paper. You will then conduct quality control testers and determine if the label on a bottle of over-the-counter product actually contains the percentage of compound that it advertises. What is a Titration
Premium PH Titration Hydrochloric acid