2. I mix 1 L of 0.1 M ammonium phosphate with 1 L of 0.1 M stronti of reaction will occur? a. Redox reaction b. Precipitation reaction c. Acid-base reaction d. All of the above 19 E reduced in each of the following reactions:
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- 1. In a tabular form, what is the difference between a Eutectic and a Eutectoid reaction? 2. What are the metastable phases? 3.Lead melts at 620 ° F (327 ° C), and tin melts at 450 ° F (232 ° C), both form a eutectic containing 62% tin at 360 ° F (182 ° C), the maximum solid solubility of tin in lead at this temperature is 19%; and lead in tin is 3%. Suppose that the solubility of each at room temperature is 1%. a.- Draw the equilibrium diagram and mark all the points, lines and areas. b.- Describe the solidification of a 40% tin alloy. Sketch its microstructure at room temperature, giving the chemical composition and the relative amounts of the phases present. c.- Draw the cooling curve for the above alloy. d.- Repeat exercises b and c for an alloy containing 90% tin. 4. Determine the chemical composition of the ternary alloys indicated as “Y” and “Z” in the attached Gibbs triangle:10. A certain heat engine draws 500 cal/s from a water bath at 27°C and transfers 400 cal/s toa reservoir at a lower temperature. The efficiency of this engine is: a. 80% b. 75% c. 55% d. 20%4. For the reaction, H2 + Br2 2HB1, a proposed reaction mechanism is given below: Br2 → 2Br. (fast) Br. + H2 – + HBr + H. (slow) Br2 + H. HBr + Br: (fast) Br + Br- Br2 (fast) If the above reaction mechanism is correct, what will be the rate law for this reaction?
- 1. How can thin layer chromatography and paper chromatography be used to verify the efficiency of purification process? 2. What is the effect of applying too much sample in chromatography?Supposed groceries ran out of stock for disinfectant products and you found out that there is still 1L household bleach left in your home. Question: 1. From 1 L of household bleach available, a. How much volume of 1:10 house hold bleach solution will you be able to prepare ? b. How much volume of water is needed? c. It has been mentioned earlier that household bleach is a solution of sodium hypochlorite which generally contains 5% (50 g/liter or 50 000 ppm) available chlorine, how many percent of chlorine is present in this solution?4. Using the integrated Rate Law. The rate law for the following reaction is rate-k[A]. A28 The rate constant, k, is 0.235 1/second. If the initial concentration of A is 0.250 M, what is the concentration of A after 60 seconds?
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- a. Petroleum b. Natural gas c. Biogas d. Coal 3. Are substances that provide the desired and specified effects of the product. a. Inactive ingredients b. Synthetic ingredients c. Active ingredients d. Soaps 4. Consider the reaction between H2 and I2. If 10 moles of H2 reacts with 8 moles of I2, how many moles of HI will be formed? a. 12 moles b. 10 moles c. 18 moles d. 16 moles poiwolle 5. Are substances that can be added to a chemical reaction to increase its reaction rate. a. Catalysts b. Products c. Reactants d. Reactions1. Consider the following reaction: 2Al+6Hbr 2 AlBr,+3H₂ a. When 3.22 moles of Al react with 4.96 moles of HBr, how many moles of H₂ are formed? b. What is the limiting reactant?40. Avogadro’s number of flourine atoms A. has a mass of 6.033 x 1023 grams B. has a mass of 12.0 g C. has the same mass as Avogadro’s number of sulfur atoms D. has a mass of 1.0 g E. is 1 mol of fluorine atoms