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Question 38 (1 point) A student prepared a solution by removing 50.0 mL of a 1.73...
1.A student delivered 11.85 mL (V1) of 2.49 % stock solution (M1) using a graduated pipette...
1.A student delivered 11.85 mL (V1) of 2.49 % stock solution (M1) using a graduated pipette into a 50.00 mL (V2) volumetric flask. Distilled water was added to the flask to the graduation mark and mixed well. Using the dilution equation (provided below), calculate the concentration of the diluted solution. (M1)(V1) = (M2)(V2) Report your answer to 3 decimal places. 2.Density is given by the equation density=mass/vol (d=m/V). Given that the density of magnesium is known to be 1.74 g/mL,...
1) A Na3PO4 standard solution is prepared by transferring 3.50 g of primary standard-grade sodium carbonate...
1) A Na3PO4 standard solution is prepared by transferring 3.50 g of primary standard-grade sodium carbonate to a 500.0-mL volumetric flask, dissolving the sample in ~250 mL of distilled deionized water and diluted to the mark. A 50.00-mL aliquot is taken and titrated with 46.65 mL of HCl solution. Calculate the concentration of the HCl solution. please show your work clear and net answer 2) If the measured potential of a half-cell is 0.584 V when measured against the S.C.E,...
A solution contains 11.70 g of unknown compound (non-electrolyte) dissolved in 50.0 mL of water. (Assume...
A solution contains 11.70 g of unknown compound (non-electrolyte) dissolved in 50.0 mL of water. (Assume a density of 1.00 g/mL for water.) The freezing point of the solution is -7.01 ∘C. The mass percent composition of the compound is 38.70% C, 9.74% H, and the rest is O. What is the molecular formula of the compound? Express your answer as a molecular formula So far I got CH3O as my empirical, but I can't seem to figure out how...
Question 4 (1 point) 0.444 g of an unknown diprotic acid is dissolved in about 60 mL of water in a beaker. The solu...
Question 4 (1 point) 0.444 g of an unknown diprotic acid is dissolved in about 60 mL of water in a beaker. The solution is transferred to a 100.00 mL volumetric flask, which is then filled up to the mark. The solution is mixed by inverting multiple times. 25.00 mL of this solution is then transferred to an Erlenmeyer flask for the titration. What mass of the diprotic acid is in the 25.00 mL that is transferred? Provide your answer...
Question 3 (1 point) A solution is prepared in a 50 mL flask by mixing 2...
Question 3 (1 point) A solution is prepared in a 50 mL flask by mixing 2 mL of 0.00322 M sodium thiocyanate with 15 mL of 0.2 M iron (IlI) nitrate. Nitric acid is used to fill the flask to the 50 mL mark. What is the concentration of FesCN2+ in the prepared solution 1.288x10-4 M 1.095x10-4 M 9.908x10-5 M 4.29x10-4 M Question 4 (1 point) Saved Consider the signs for AH and AS, for different reactions. Which of the...
1. Calculate the concentration of a solution prepared by adding 15.00 mL of 1.97 x 10-MKMnO4...
1. Calculate the concentration of a solution prepared by adding 15.00 mL of 1.97 x 10-MKMnO4 from a buret into a 50.00 mL volumetric flask, which is then filled to the 50.00 mL graduation mark with distilled water. Hint. This is a dilution calculation M Your answer is incorrect - Check your calculations. 2. A linear standard curve of KMnO4 is prepared from a set of standard solutions by plotting absorbance (y) vs. concentration (x). Use Google Sheets/Excel to plot...
Amy prepared her base solution by adding 16 mL of 6.1 M NaOH to her 500...
Amy prepared her base solution by adding 16 mL of 6.1 M NaOH to her 500 mL bottle and then filling it to the shoulder. She then standardized her base solution by titrating it with a 0.216 M HCl solution. She filled one buret with her NaOH solution and another buret with the HCl solution. The initial readings on the burets were 1.74 mL (NaOH) and 1.43 mL (HCl). She then dispensed some HCl into an Erlenmeyer flask, added a...
Question 9 (1 point) A solution is prepared by dissolving 50.0000 grams of sodium sulphate in...
Question 9 (1 point) A solution is prepared by dissolving 50.0000 grams of sodium sulphate in 700.0 mL of distilled water. Calculate the concentration in Molarity. Give your answers to four places after the decimal place. Your Answer: Answer units
Question 6 (1 point) 1.681 g of an unknown diprotic acid are used to make a 100.00 mL solution. Then 25.00 mL of th...
Question 6 (1 point) 1.681 g of an unknown diprotic acid are used to make a 100.00 mL solution. Then 25.00 mL of this solution is transferred to an Erlenmeyer flask and is titrated with 0.1047 M NaOH. The titration endpoint is reached after 0.00411 mol of NaOH is added using the burette. What is the molar mass of the diprotic acid? Provide your answer to the correct number of significant figures. Your Answer: Answer units
10.0 mL of the aqeuous ammonium chloride solution from question 1 above is diluted by adding...
10.0 mL of the aqeuous ammonium chloride solution from question 1 above is diluted by adding 15.0 mL of distilled water. What is the new Molarity of this diluted solution? Give your answer to the correct number of significant figures. Type in only the numbers. Do not include the molarity unit (M or moles/L). Note: the answer will be a molarity less than 1. Make sure to type in the leading zero. For example, if your answer is 0.111, type...
Question 4 (1 point) 0.444 g of an unknown diprotic acid is dissolved in about 60 mL of water in a beaker. The solution is transferred to a 100.00 mL volumetric flask, which is then filled up to the mark. The solution is mixed by inverting multiple times. 25.00 mL of this solution is then transferred to an Erlenmeyer flask for the titration. What mass of the diprotic acid is in the 25.00 mL that is transferred? Provide your answer...
Question 3 (1 point) A solution is prepared in a 50 mL flask by mixing 2 mL of 0.00322 M sodium thiocyanate with 15 mL of 0.2 M iron (IlI) nitrate. Nitric acid is used to fill the flask to the 50 mL mark. What is the concentration of FesCN2+ in the prepared solution 1.288x10-4 M 1.095x10-4 M 9.908x10-5 M 4.29x10-4 M Question 4 (1 point) Saved Consider the signs for AH and AS, for different reactions. Which of the...
1. Calculate the concentration of a solution prepared by adding 15.00 mL of 1.97 x 10-MKMnO4 from a buret into a 50.00 mL volumetric flask, which is then filled to the 50.00 mL graduation mark with distilled water. Hint. This is a dilution calculation M Your answer is incorrect - Check your calculations. 2. A linear standard curve of KMnO4 is prepared from a set of standard solutions by plotting absorbance (y) vs. concentration (x). Use Google Sheets/Excel to plot...
Question 9 (1 point) A solution is prepared by dissolving 50.0000 grams of sodium sulphate in 700.0 mL of distilled water. Calculate the concentration in Molarity. Give your answers to four places after the decimal place. Your Answer: Answer units
Question 6 (1 point) 1.681 g of an unknown diprotic acid are used to make a 100.00 mL solution. Then 25.00 mL of this solution is transferred to an Erlenmeyer flask and is titrated with 0.1047 M NaOH. The titration endpoint is reached after 0.00411 mol of NaOH is added using the burette. What is the molar mass of the diprotic acid? Provide your answer to the correct number of significant figures. Your Answer: Answer units
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