nutritional chemistry red tomatoes raw nutritional value per 100 gm (3.5 oz) contains 20 kcal‚ carbohydrate - 4 gm‚ sugar – 2.6 gm‚ dietary fibre – 1 gm‚ fat – 0.2 gm‚ protein – 1 gm‚ water – 95 gm‚ vitamin C – 13 gm. It also contains minerals like calcium – 48 gm‚ phosphorous 20 –gm‚ iron – 0.4 gm‚ small amount of vitamin B complex. The tomato is essentially an alkaline vegetable‚ its acid taste is due to malic acid which is about 0.5% it also contains 0.52& to 1.81 citric acid and only a trace of
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2 mL of the cobalt chloride solution was added to three separate test tubes (A‚ B‚ and C). 1 mL of silver nitrate (milky white color) was added in test tube A Three gains of calcium chloride was added to test tube B 1 mL of Hydrochloric Acid was added to test tube C Activity D: Solubility of Carbon Dioxide: Approximately 10 mL of fresh seltzer water has mixed with 20 drops of 0.04 % bromcresol green indicator. The initial
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the experiment 23ml of vegetable oil was mixed with 20ml of ethyl alcohol along with 20 ml of 25% sodium hydroxide in a 250-mL Erlenmeyer flask. The content was then heated on a water bath whilst gently mixing with a glass rod. After 20 minutes of heating the alcohol scent disappeared denoting the completion of the reaction with pasty mass comprising of soap‚ glycerol and excess sodium hydroxide. After this was done an ice bath was used to precipitate the soap along with 150ml of saturated sodium chloride
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crystals mean the rock cooled quickly - eg granite - sedimentary rock formed by layers of sediment being compacted over a long time - eroded more easily than other kinds of rock - can contain fossils but no crystals - eg chalk + limestone (from calcium carbonate) - metamorphic rock has crystals - formed by heat + pressure on sedimentary rock - contains interlocking crystals - eg marble (from limestone or chalk) quarrying limestone - produces local jobs in rural areas + improves economy
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hydrolyze the enzyme Urease efficiently to produce microbial concrete. Such bacterial are known to produce calcium which is useful in giving strength to cement. We are working in 2 stages. Stage 1: Here we check the effect of bacterial solution on cement mortar and along with that we check the effectiveness of the bacterial solution to fill the cracks in concrete by precipitation of calcium in the cracks. Stage 2: To prepare concrete using the cement and solution (bacterial) in optimum ratio
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lab focuses on the detection of ions using titration as an analysis tool. You will standardize NaOH and HCl solutions so that you know the exact concentration and then prepare samples of common household items in order to determine the amount of calcium in Tang®‚ 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
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Hydrogen Tartrate Wang Haina 1. Aim 1. To determine the solubility of potassium hydrogen tartrate (KHT) at various temperatures from 10°C to 50 °C‚ and determine the corresponding Ksp at these temperatures. 2. To obtain the changes in enthalpy and entropy of the dissolution of KHT from the dependence of Ksp on temperature. 2. Results and discussion 2.1 Collection of data A portion of KHT (1 to 1.5 g) was added into about 100 mL of deionised water to prepare a saturated KHT solution. Several
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of a Mixture of sand and copper salt • In a test tube stir 2 g of sand copper and 5ml of water. • In a hot plate heat up the beaker with the supernatant until water is evaporated. Separation of a Mixture of sand‚ calcium‚ and copper • In a beaker add 3g of sand‚ calcium‚ copper and deionized water and stir until copper dissolves. • Put a filter paper into a funnel‚ then pour the mixture into the filtering apparatus letting it drop into a beaker. • Transfer the solid from the filter paper
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feeling on contact with skin. Bases readily accept hydrogen ions and has a pH level that is higher the 7. Bases have a bitter taste and neutralise d by acids‚ producing water and a salt. Some common laboratory bases are Sodium Hydroxide‚ Potassium Hydroxide and Calcium Hydroxide. Stronger bases are commonly used today in many cleaning products. Indicators help us find wether if a chemical is an acid or base. The scale that is used to find wether a chemical is an acid or a base is the pH scale. The
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found by moles divided by liters which declined with every titration because less and less solution was needed. After the molarity of the Cl- is found the molarity of Pb2+ is half the molarity of Cl- since there is 2 Cl- ions for each Pb2+ ion. Then Ksp can be calculated from equation (3). Then a graph can be created to find free energy of the reaction by lnKsp vs.
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