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- 1. (answer the questions in the tan boxes in the tables below each question) A student conducted an investigation to determine the effect of water temperature on the amount of sugar that dissolves in a beaker of water. Identify components for trial 1 of this investigation. Beaker Number 1 2 3 4 Amount of Water (mL) 100 100 100 100 Amount of Water (mL) Trial 1 Temperature of Temperature of Amount of Sugar Sugar (°C) Water (°C) Dissolved (g) 20 20 20 20 Temperature of Sugar 5 10 15 20 185 189 194 204 Temperature of Water Terms Variable Constant Amount of Sugar DissolvedObjective KTIO A chemistry student weighs out 0.0434 g of sulfurous acid (H,SO,), a diprotic acid, into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1800M NAOH solution. Calculate the volume of NaOH solution the student will need to add to reach the final equivalence point. Round your answer to 3 significant digits. mt. I Don't Know Submit 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use Privacy Center Accessibility Launcher LenovoA student weights out 3 samples of KHP to standardize a NaOH solution and added 100 mL to each flask. They ran out of time and placed the flasks in the storage cabinet for the week. The following week the flasks only contained 85 mL of solution. What should the student do? O a) Add 15 mL of water and continue. KHP does not evaporate. b) Start over. Some of the acid evaporated O c) Decrease the volume in the burette by 15 mL as well. d) Add more indicator to account for the decreased volume.
- Muriatic acid is the commercial name for hydrochloric acid that can be purchased from hardware stores as a solution that is 37 % (w/w) HCI. What mass of this solution contains 7.5 g of HCI? Part 1 Your answer is correct. To begin this problem, one must find a way to relate the percentage by weight of HCI to grams of the solution. To do this, assume 37 g of HCI per 100 g of solution. eTextbook and Media Attempts: 1 of 15 used Part 2 Your answer is correct. Set up an equation to solve for grams of solution. 8 soln 8soln = SHCI 8HCI 8soln = (8HCI 8 solr 8roln = (8Hci) [(8som ) (8ncı)] Attempts: 1 of 15 used Part 3 Input the appropriate values to solve for the mass of a 37% (w/w) solution of HCI that contains 7,5 gof HCI? g solution Save for Later Attempts: 0 of 15 used Submit Answer(record your final answer rounded to the correct significant digits and the proper units.) 1. A neutralization reaction occurs when phosphoric acid reacts with sodium hydroxide solution. Calculate the concentration (in mol/L) of a phosphoric acid solution if 37.9 mL of H3PO4(aq) requires 0.377 mol of NaOH(aq), for complete neutralization. 2.Calculate the mass of precipitate (in g) produced when 50 mL of 4.00 mol/L sodium hydroxide solution is reacted with excess aluminium nitrate solution.Solution 1 is diluted by combining 6 mL of Solution 1 with 64 mL of Solution 2. What is the dilution of solution 1? Report your answer in standard decimal notation rounded to two decimal places. For example, 4 mL added to 16 mL would be a 0.20 dilution. Include trailing zeros if necessary so your answer has two decimal places.
- 1. You have a stock solution of 14.2 M NH3. How many milliliters of this solution should you dilute to make 1000 mL of 0.210 M NH3? Express your answer using three significant figures. 2. If you take a 15.0-mL portion of the stock solution and dilute it to a total volume of 0.700 L, what will be the concentration of the final solution? Express your answer using three significant figures.How many milliliters of a 4.10 M sucrose solution would be needed to prepare each solution? Note: Reference the SI prefixes table for additional information. Part 1 of 2 1.47 L of a 0.048 M solution. Round your answer to 2 significant figures. Part 2 of 2 mL ☐ x10 ☑ 85. mL of a 2.0 M solution. Round your answer to 2 significant figures. mL ☐ x10 ☑A) Calculate the molarity 12.21 mg KI in 107.6 mL of solution Express your answer using four significant figures. B) A chemist wants to make 6.0 L of a 0.310 MCaCl2 solution. What mass of CaCl2 (in g) should the chemist use? Express your answer in grams using two significant figures.
- The percent concentration of a solution is a ratio of the amounts of dissolved solute and solution, expressed as a percentage. The percent concentration of a solution can be written generally as % concentration = amount of solute x 100% amount of solution Depending on the situation, a percent concentration might be calculated for mass/mass, volume/volume, or mass/volume. tab os lock ntrol esc alt option Q A Z 5,566 2 W S AUG 2 F2 X H command 3 20 E F3 D $ 4 C 888 R Part A F4 70 Calculate the mass percent of a solution that is prepared by adding 54.8 g of NaOH to 461 g of H₂O. Express your answer numerically. ► View Available Hint(s) LIVE ΑΣΦΑ++ ο Submit Part B F [ΫΠ| ΑΣΦ Calculate the mass/volume percent of a NaCl solution in which 136 g of NaCl is dissolved in enough water to give a total volume of 1.44 L . Express your answer numerically. View Available Hint(s) % 5 V T G - 0 B MacBook Air F6 Y & - V 8⁰ 7 H #tv NA ? F7 ? U N %(m/m) %(m/v) 00* J FB M ( 9 K L F10 P command Review I Cons…Percent by Mass= Mass of Solute x100 Percent by volume and Percent by Mass calculations Mass of Solution Volume of Solute Name: Percent by Volume= -x100 Volume of Solution 1. 1. Calculate the percent by volume if 56.7 ml of alcohol is added to 540 ml of water. (Remember to add both solute and solvent to get the total volume of solution to put on the bottom.) 540 15.23 2 Calculate the percent by mass if 35.0 grams of NaC! is added to 455 grams of water to make a salt solution. 3. Calculate the percent by volume if 15.5 ml of HCI is added to 1.0 Liter of water. 4. Calculate the amount of water needed to make a 5% solution of alcohol, if you have 25 ml of alcohol? (Hint: first you will need to find the total amount of solution needed. then subtract the 25 ml from that.)À chemistry student weighs out 0.184 g of phosphoric acid (H, PO). a triprotic acid, into a 250, ml. volumetric flask and dilutes to the mark with distiled water. He plans to titrate the acid with 0.1400M NAOH solution. Calculate the volume of NaOH solution the student will need to add to reach the final equivalence point. Be sure your answer has the correct number of significant digits.