reactions 3. To become more familiar with the use titration techniques 4. To learn how to get the salt out of an quimical Background: To develop and utilize procedures to determine the percent composition‚ of ZnCI2. As well titrating with NaOH solution. After all the experiment we got hta salt witch we weighted and we got our results. Experiment reactions: .33w of Zn(OH)2 x moles Zn(OH)2/m. moles Zn(OH2) x 1molZnCI2/1 mol Zn(OH)2 x g molZnCI2/1 mol of ZnCL2 = .4531 grams of ZnCI2 .4531g of
Premium Chemistry Titration Concentration
mL of solvent and repeat the entire extraction procedure. Add the resulting extract to the first extract (in the second centrifuge tube). Now wash (microscale) the combined extracts with saturated NaCl solution (5mL)‚ then with 10% aqueous potassium carbonate (5mL)‚ then with saturated NaCl solution (5 mL) again. Dry the organic layer with anhydrous sodium sulfate. Decant the organic layer into a small beaker and concentrate to roughly 0.2 mL by evaporation in the hood (do not apply heat!). If the
Premium Column chromatography Chromatography Tomato
Assessment 7 Question 1 of 12 The equilibrium constant Kp for the reaction CO(g) + Cl2(g) ↔ COCl2(g) is 5.62 x 1035 at 25°C. Calculate ΔGf° for COCl2 at 25°C. (ΔGf° for CO(g) = –137.3 kJ/mol at 25°C) PRIVATE "<INPUT TYPE=\"radio\" NAME=\"null_12_0\" VALUE=\"3\" DISABLED>" MACROBUTTON HTMLDirect A. –66.7 kJ/mol PRIVATE "<INPUT TYPE=\"radio\" NAME=\"null_12_0\" VALUE=\"1\" DISABLED>" MACROBUTTON HTMLDirect B. 188 kJ/mol PRIVATE "<INPUT TYPE=\"radio\" NAME=\"null_12_0\"
Premium
Periodically Puzzling Here are some questions about the elements‚ their properties‚ and periodicity. In each case‚ the correct answer is the name of an element (one of the two given). Write the answer in the appropriate space at the right‚ placing the first letter in the first blank. There are more than enough blanks to fit either element name‚ so the number of letters in the name cannot be used as a clue. When the puzzle is complete‚ the Periodic Law will be displayed in the highlighted column
Premium Metal Periodic table
Unit _ - Control of Air Pollution FABRIC FILTER – It consists of a tabular bag which is closed at the upper end and has a happer attached at the lower end to collect particles when they are dislodged from the fabric. Many such bags are hanged in a bag house. The filter bags are cleaned occasionally by a mechanical shaker for efficient filtration. It has high efficiency and can filter 0.5 µm size particles. ELECTROSTATIC PRECIPITATOR – It works on the principle of electrostatic precipitation
Premium Air pollution Electric charge Gas
piece of copper into a solution of nickel chloride and observed no reaction. Then if you inserted a piece of iron into the solution of nickel chloride a nickel deposit formed on the bottom of the well in the well plate. Where does nickel fit into your activity series? The chemical reactions for the preceding question B are: Cu (s) + NiCl2 (aq) à no reaction Fe (s) + NiCl2 (aq) à 2 Ni (s) + Fe Cl2 (aq) C. Suppose you inserted a piece of an unknown metal into a solution of zinc (II) nitrate
Premium Iron Hydrogen Copper
25.40 | 25.45 | Initial volume of FA2 (± 0.05) /cm3 | 0.00 | 0.00 | 0.00 | Volume of FA2 used (± 0.10) /cm3 | 25.30 | 25.40 | 25.45 | Titration used | | √ | √ | Qualitative observations: - FA2 and FA3 are colourless solutions. - Titration is done until the solution turns permanently pink. Calculations | Propagation of uncertainties | | | Average volume of FA2 used | ± ∆ Average volume of FA2 used | = (25.40 + 25.45)/2 | = ± ½ (0.10+0.10) | = 25.43 cm3 | = ± 0.10 cm3 | |
Premium Kilogram
problems such as diabetes‚ heart disease‚ arthritis‚ and hypertension. What is the solution to this problem besides medication and surgery? One of the easier and simpler solutions is to drink alkaline water. To understand what alkaline water is‚ we must know where it comes from‚ and how it works. Knowledge of the benefits of alkaline water for treating obesity will help solve this national problem. SOLUTION FOR OBESITY This research report discusses the benefits of alkaline water for obesity
Premium Water
Alpha amylase is an enzyme that aids in the breakdown of starch and glycogen to form glucose and maltose through the hydrolyses of alpha linked polysaccharides1. Starch is a complex carbon and is the main energy storage material found in plants and some bacteria. It is a major component of food as it supplies plants with energy and carbon. Starch consists of two types of polysaccharides called amylose and amylopectin1.The properties of starch can depend on the number of alpha 1‚4 glycosidic bonds
Premium Starch Enzyme
2(3) = 6. Hence‚ the range of f o g is {y : y ∈ R‚ y ≠ 6}. (b) The graph of y = f g(x) = 2x‚ x ≠ 3 is as shown below. =2 3+ 1 2 © Oxford Fajar Sdn. Bhd. (008974-T) 2012 Chap-07-FWS.indd 2 10/18/2012 9:48:52 AM Fully Worked Solution 3 y 6 x O 3 y = 2x (c) lim f g(x) = 2(3) x→3 =6
Premium Function