Standardisation of a Solution of Sodium Hydroxide: Introduction: In a lot of cases it isn’t possible to prepare a solution by accurate weighing of the solute‚ dissolving in water and diluting to volume. There are many possible reasons for this‚ but in the case of sodium hydroxide‚ the solid absorbs moisture from the air‚ and also reacts with carbon dioxide from the air. In that case‚ it cannot be accurately weighed in air. In an experiment like this‚ a solution of the approximate required concentration
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11/17/2011 The Preparation of Calcium Carbonate Purpose: To create chalk (calcium carbonate) and to find the percentage yield in order to see the amounts of anhydrous sodium carbonate and calcium chloride were used up. Also to see if there’s any alterations like mass differentials. Objectives: 1. To introduce the concept of “limiting factor” in a chemical reaction 2. To practice a. Writing a balanced equation b. Determining the number of moles of each reactant and product
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activity of sodium butyldithiocarbamate pentahydrate‚ C5H20NNaO5S2 Ayodele T. Odularu a‚ Peter A. Ajibade a‚ Bolhuis‚ A. b a. Department of Chemistry‚ University of Fort Hare‚ Private Bag X1314‚ Alice 5700‚ South Africa. b. Department of Pharmacy and Pharmacology‚ University of Bath‚ United Kingdom. Abstract Synthesis of sodium butyldithiocarbamate pentahydrate‚ C5H20NNaO5S2‚ entailed a one-pot synthesis. The process of synthesis involved the use of butyl amine‚ carbon(IV) sulfide and sodium hydroxide
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Decomposing Copper Carbonate Mass of Crucible (g) Mass of CuCo3 added (g) Mass of Crucible + Copper Oxide (g) Mass of CuO produced (g) 0.00 0.25 0.50 0.75 1.00 1.25 What happens to the mass of the copper carbonate when it is heated? Give a conclusion‚ which describes why the mass of copper carbonate may have changed during your experiment. When the copper carbonate is heated it decomposes forming copper oxide and carbon dioxide. The copper carbonate turns into a bright
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Weight of ampicillin sodium (mg) What weight (in mg) of ampicillin sodium (C16H18N3NaO4S) will provide 144 mg of ampicillin base (C16H19N3O4S)? 27. Weight of potassium permanganate (g) Potassium permanganate is normally made as a concentrated solution which is then diluted prior to
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when you observe it‚ only one phase is visible. (1 mark lost) 43. Sodium Carbonate will be very soluble in water because of the positive ions of sodium attached to the negative ions of the carbonate. Methanol will be partly soluble in water due to it’s small size and the presence of the OH group in the molecule and it’s very polar nature. Gasoline (Octane)‚ is completely insoluble since it is non-polar.
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In the experiment‚ we tested a sodium chloride solution. Along with the tested solution‚ control groups (water and sodium phosphate) were used to be help understand whether or not NaCl was a buffer. Water was the negative control group and sodium phosphate was the positive control group. If NaCl was a buffer than the pH would be stabled as the sodium phosphate buffer. If NaCl was not a buffer than the pH would fluctuate like the negative control‚ water. During the first trial and prior to the drops
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of 0.1M Sodium phosphate Monobasic‚ which equal 2.9995g‚ we added it to the 250ml beaker and added 50.0ml of water to dissolve it. On the same time‚ we prepared 250ml of 0.1 Sodium phosphate Dibasic‚ which equal to 3.549g; we added 50.0ml of water to be dissolved. We made these two solutions in order to get their PH. We started with PH 6.0 buffer from Sodium phosphate monobasic solution‚ we added 50ml of Sodium phosphate Dibasic to 250ml beaker‚ placed PH probe‚ then added solution Sodium phosphate
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Decomposition of Sodium Chlorate Mass‚ Moles‚ and the Chemical Equation Introduction: Sodium chlorate is used as a source of oxygen in emergency oxygen generators. So-called oxygen canisters or oxygen candles are found on airplanes‚ submarines‚ even the space station–anywhere where oxygen might be in short supply in case of an emergency. Sodium chlorate decomposes upon heating or in the presence of metals to give oxygen gas. What the chemical equation for the decomposition of sodium chlorate?
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Results and discussion: I. a. How would you compare that relative reactivity of Na and k -Sodium and potassium react somewhat similar when reacting with water however they are slightly different. Sodium moves because of the hydrogen coming off of it and has a low melting point while potassium’s reaction is faster and enough heat is produced to set light to the hydrogen coming off of it. Each leaves a pink color hue in the water. Discuss the similarities and differences in the behavior of the metals
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