Procedure: 1. Half fill one 400mL beaker with tap water. Add a few boiling chips and turn on the hotplate to the highest temperature setting or if your lab is equipped with burners light the burner. Bring the water to a boil and then turn the heat down so that the water continues to boil. 2. Put 150mL of tap water into a second beaker and add ice to
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Title Investigation of the suitability of indicators and instrumental detection of equivalence points in acid-base titration. Objective 1. To understand the importance of choosing suitable indicators for detecting the end points of acid-base titrations. 2. To obtain titration curves for some acid-base titrations. Materials and Method (Please refer to the General Chemistry BPH2012 practical manual pg 4-5) Results Part I: Suitability of Indicators A.Strong acid-weak base titration
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The process of distillation is commonly used to purify liquids. The process of distillation allows separation of distillates based on the temperatures at which they boil. Liquids with higher volatility boil at lower rates than liquids that are less volatile. Because of this when a mixture of two substances is created there will be a spike in the boiling point. At the spike the more volatile substance has vaporized and condense out of the mixture leaving the less volatile liquid. Thus the temperature
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QCalorimeter] which translates into (mcΔT)Substance = - [(mcΔT)Water + (CΔT)Calorimeter] Materials: Coffee-cup calorimeter Water Safety Goggles Thermometer Lab Apron Ringstand Tongs Clamp Graduated Cylinder Test tube Unknown Metal Sample Hotplate Triple Beam Balance (or other mass measuring equipment) 600 ml Beaker Procedure: 1. Follow all safety guidelines prior to starting. Clear lab station. Gather all materials. 2. Set up the coffee-cup calorimeter as shown in the previous
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Zimbabwe Retail Sector: A look at some of the challenges presented by good economy growth. By Girland Chibaya A recent Economic Report for Africa mentioned that Zimbabwe is now ranked among the top 10 economic performers in Africa. While this is good news‚ what does this mean especially to those South African retail companies that are looking into investing in the country. A recent trend has shown that most retailers are starting to pay more attention to store growth to both South Africa and Sub-Saharan
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down the cracker quicker‚ resulting in the colour change into a orange. Finally‚ the boiled test tube will also turn orange faster than the one at room temperature because the boiling water will speed up • 4 test tubes labeled 1-4 • hotplate • stirring rod • test tube rack/stand 1. Four test tubes were placed in a stand and labeled #1-4 with masking tape 2. The first test tube was half filled with water only 3. The second test tube was about one-quarter filled with saliva
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PART A: 1. Press the On/Off button to turn on the MeasureNet workstation 2. Press Main Menu‚ then press F2 Temperature‚ next press F1 Temperature vs. Time. 3. Half fill a 150-mL beaker with ice and water. Press calibrate to calibrate the temperature probe. When prompted‚ enter 0.0 *C as the actual temperature of the constant temperature bath (ice water). Press Enter. Insert the temperature probe in the ice water. Swirl the temperature probe until the temperature approaches and stabilizes
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Materials and methods Plant material Aerial parts of wild-growing M. officinalis were collected during April from Aum-Romanna (Jordan) by one of us (EYQ). The plant material was identified and authenticated taxonomically at the Hashemite University herbarium. A voucher specimen was deposited under the number HU-437 at the Hashemite University herbarium‚ Zarka‚ Jordan‚ for future reference. Determination of essential oil composition Samples of dried aerial parts (300g each sample) of M. officinalis
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Red Cabbage Indicator Experiment Aim: The aim of our investigation was to identify and understand how different chemicals (Acids‚ alkalis and neutral) react and experience a change in colour due of this. Introduction: The red cabbage indicator shows how a usual household product such as red cabbage can make a suitable indicator and be able find out if a chemical is either and acid‚ alkali or neutral. Acids are a chemical that reacts with an alkali neutralising it producing water
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Introduction Protein purification is the series of processes to isolate a single type of protein from a complex mixture. This is vital to extract and characterize the protein of interest. However‚ before doing so‚ it is important to release the protein from the subcellular organelles. This step is also known as homogenization. This step can be done with the use of blender. As the solution was homogenized‚ it may undergo saltation or acidation to remove impurities such as calcium anions. Hexane
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