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Question 8 The NaOEt solution is prepared by adding 2.3 g Na(s) to 40 mL absolute...
A buffer is prepared by adding 20.0 g of sodium acetate (CH3COONa) to 480 mL of...
A buffer is prepared by adding 20.0 g of sodium acetate (CH3COONa) to 480 mL of a 0.160 M acetic acid(CH3COOH) solution. 1. Determine the pHpH of the buffer. 2. Write the complete ionic equation for the reaction that occurs when a few drops of hydrochloric acid are added to the buffer.Identify all of the phases in your answer. 3. Write the complete ionic equation for the reaction that occurs when a few drops of sodium hydroxide solution are added...
A solution was prepared by adding 12.00 ml 3.00 mL of 0.130 M KNO_3, 5.00 mL...
A solution was prepared by adding 12.00 ml 3.00 mL of 0.130 M KNO_3, 5.00 mL of 0.0100 M Na_2S_2O_3, 1.00 mL of starch solution, and 15.00 mL of 0.130 M (NH_4)_2 S_2O_8. Assuming the volumes of the components are additive, calculate the concentration (M) of I^- in the final mixture before the chemical reaction. Show the calculation. Calculate the concentration (M) of S_2O_8^2- in the mixture prior to the reaction. Show the calculation. Calculate the concentration (M) of S_2O_3^2-...
This solution of unknown a in napthalene was prepared by adding 2.70 mL of unknown a...
This solution of unknown a in napthalene was prepared by adding 2.70 mL of unknown a (D=1.25g/mL) to 19.950 g of napthalene. using this data and your answer to the previous question (my answer was freezing point depression=8 degrees C). calculate the molar mass of unknown a. kf of napthalene is 6.94 c*kg/mol please show all work
A buffer is prepared by adding 150 mL of 1.0 M NaOH to 250 mL of...
A buffer is prepared by adding 150 mL of 1.0 M NaOH to 250 mL of 1.0 M NaH2PO4. How many moles of HCl must be added to this buffer solution to change the pH by 0.18 units? The answer is .025mol Please use chart if possible. Show all steps and calulations please
A buffer is prepared by adding 18.0 g of sodium acetate (CH3COONa) to 490 mL of...
A buffer is prepared by adding 18.0 g of sodium acetate (CH3COONa) to 490 mL of a 0.140 M acetic acid (CH3COOH) solution. 1) Determine the pH of the buffer. 2) Write the complete ionic equation for the reaction that occurs when a few drops of hydrochloric acid are added to the buffer. (Express your answer as a chemical equation. Identify all of the phases in your answer.) 3) Write the complete ionic equation for the reaction that occurs when...
A buffer is prepared by adding 23.0 g of sodium acetate (CH3COONa) to 500 mL of...
A buffer is prepared by adding 23.0 g of sodium acetate (CH3COONa) to 500 mL of a 0.160 M acetic acid (CH3COOH) solution. Write the complete ionic equation for the reaction that occurs when a few drops of hydrochloric acid are added to the buffer. Write the complete ionic equation for the reaction that occurs when a few drops of sodium hydroxide solution are added to the buffer. Express your answer as a chemical equation. Identify all of the phases...
3. A glucose solution (CHO) is prepared by adding 5.00 g of glucose to enough water...
3. A glucose solution (CHO) is prepared by adding 5.00 g of glucose to enough water to make 2000 mL of solution What is the % (m/V) of this solution? b. What volume in ml. of this solution would contain 0.0735 g of glucose? c. How many grams of glucose would be present in 185 ml of this solution? d. How many moles of glucose would be present in 49.7mL of this solution? e. If the density of the solution...
QUESTION 1 Determine the pH (to two decimal places) of a solution prepared by adding 93.9...
QUESTION 1 Determine the pH (to two decimal places) of a solution prepared by adding 93.9 ml. of 0 271 M formic acid (HCO2H) to 40.3 g of sodium formato (NaCo2H). Assume the volume of the solution does not change and that the 5% approximation is valid The pka of formic acid is 3.75.
Question 17 A solution is prepared by dissolving 45 g sodium carbonate, Na2CO3, in enough water...
Question 17 A solution is prepared by dissolving 45 g sodium carbonate, Na2CO3, in enough water to make 200 mL of solution. If the density of the solution is 1.1094 g/mL, what is the % mass of the solution? Question 18 Calculate the molarity of a 4.628 m solution of Sr(NO3)2 in H2O. The density of this solution is 1 g/mL Include units. Question 19 What is the molarity of a sodium chloride solution prepared by diluting 2.1 mL of...
QUESTION 7 What is the molarity of a solution prepared by dissolving 1453 g of lactose...
QUESTION 7 What is the molarity of a solution prepared by dissolving 1453 g of lactose (C12H2011) in 2890 mL of water? Molanity- moles of solute L solution Number of moles mass of compound molar mass 5 points) A. Moles lactose B. Molarity:
A solution was prepared by adding 12.00 ml 3.00 mL of 0.130 M KNO_3, 5.00 mL of 0.0100 M Na_2S_2O_3, 1.00 mL of starch solution, and 15.00 mL of 0.130 M (NH_4)_2 S_2O_8. Assuming the volumes of the components are additive, calculate the concentration (M) of I^- in the final mixture before the chemical reaction. Show the calculation. Calculate the concentration (M) of S_2O_8^2- in the mixture prior to the reaction. Show the calculation. Calculate the concentration (M) of S_2O_3^2-...
3. A glucose solution (CHO) is prepared by adding 5.00 g of glucose to enough water to make 2000 mL of solution What is the % (m/V) of this solution? b. What volume in ml. of this solution would contain 0.0735 g of glucose? c. How many grams of glucose would be present in 185 ml of this solution? d. How many moles of glucose would be present in 49.7mL of this solution? e. If the density of the solution...
QUESTION 1 Determine the pH (to two decimal places) of a solution prepared by adding 93.9 ml. of 0 271 M formic acid (HCO2H) to 40.3 g of sodium formato (NaCo2H). Assume the volume of the solution does not change and that the 5% approximation is valid The pka of formic acid is 3.75.
QUESTION 7 What is the molarity of a solution prepared by dissolving 1453 g of lactose (C12H2011) in 2890 mL of water? Molanity- moles of solute L solution Number of moles mass of compound molar mass 5 points) A. Moles lactose B. Molarity:
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