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Section Laboratory Caleulations LA 30 ml sample of NaCl solution was 957 orams. When the water...
Section Laboratory Caleulations 1.A.0 ml sample of NaCl solution was 5057 grams. When the water was...
Section Laboratory Caleulations 1.A.0 ml sample of NaCl solution was 5057 grams. When the water was evaporated, the residual salt weighed 1.285 grams (10 pts) Fill in the data table below using the information given Mass of salt solution Mass of NaCl Mass of water Volume of solution Using the information from the data table, calculate: a. The % weight-weight of NaCl in the solution. b. The grams of NaCl per 100 grams of water. C. The molarity of the...
om 4. In the structural features of sw a welch of the following was to distinguish...
om 4. In the structural features of sw a welch of the following was to distinguish reducing monosaccharides freeding disaccharides? (a) Benedict's Test (e) ladine Test (b) Molisch Test (d) Barfoed's Test is indicate 3. In the Seliwanoll's test, a positive result for the presence of ketohexos what color? (a) purple (c) dark reddish brown (b) red-orange (d) greenish-blue 6. Vitamin C is also known as (a) sodium hydroxide (b) sulfuric acid (e) ascorbic acid (d) glucose 7. The oxidation...
10. Volume of sample in liters 11. Molarity of NaCl solution (Show calculations.) Questions and Problems...
10. Volume of sample in liters 11. Molarity of NaCl solution (Show calculations.) Questions and Problems 05 A 15.0-ml sample of NaCl solution has a mass of 15.78 g. After the NaCl solu- tion is evaporated to dryness, the dry salt residue has a mass of 3.26 g. Calculate the following concentrations for the NaCl solution. a. % (m/m) b. % (m/v) c. molarity (M) Q6 How many grams of KI are in 25.0 mL of a 3.0% (m/v) KI...
A 12.34 mL solution with an unknown salt concentration had a mass of 10.25 g. When...
A 12.34 mL solution with an unknown salt concentration had a mass of 10.25 g. When the water was evaporated from the solution. 4.78 g of NaCl remained. a Calculate the mass-mass percent NaCl concentration in the solution. Show your work. b Calculate the mass-volume percent NaCl concentration in the solution. Show your work. Calculate the molarity of NaCl in the solution. Show your work.
17) How many grams of water are in 250.0 g of a 5% by mass solution?...
17) How many grams of water are in 250.0 g of a 5% by mass solution? How many grams of sugar are in this solution? 18) A solution is prepared with 45.0 g of NaCl in enough water to make a 50mL solution. What is the molarity of the solution? 19) If 345 g of MgCl, solution is evaporated and 32.8 g of magnesium chloride are collected. What is the mass percent of the salt in the solution? How much...
Question 1. A 2.700×10−2M solution of NaCl in water is at 20.0∘C. The sample was created...
Question 1. A 2.700×10−2M solution of NaCl in water is at 20.0∘C. The sample was created by dissolving a sample of NaCl in water and then bringing the volume up to 1.000 L. It was determined that the volume of water needed to do this was 999.3 mL . The density of water at 20.0∘C is 0.9982 g/mL. a.)Calculate the molality of the salt solution. B.) Calculate the mole fraction of salt in this solution. C.) Calculate the concentration of...
Johnny wished to create a 0.300 M NaCl solution. Johnny only had 50.0 mL of water,...
Johnny wished to create a 0.300 M NaCl solution. Johnny only had 50.0 mL of water, however. To create his goal solution, Johnny knew he needed to know the molar mass of NaCl, which was [Select ] Next, to find the the number of moles of Naci he needed, Johnny simply multiplied the [Select] by the volume of water, in liters, which was [Select) L. Then, he calculated the number of grams of NaCl he needed taking this number of...
need help with questions 3,4,5 Laboratory Questions: Saturated Solutions The data below was collected in an...
need help with questions 3,4,5
Laboratory Questions: Saturated Solutions The data below was collected in an experiment to determine the solublity of sodium nitrate at 20 C. Total Volume of Water (mL) Saturation Temp (C Solubility (g salt/100g water) 3.50 139.3 78.0 3.75 70.0 4.00 60.0 121.8 4.25 52.0 4.50 45.0 08. 3 4.75 5.00 36.0 Na NO3 73 1. If 4.8739 g of NaNO, was used, calculate the solubility in units of g NaNO,/100 g water at each saturation...
Experiment 9: Water Hardness Pre-Laboratory Questions Name Section 1. Part of a buret measuring in mL...
Experiment 9: Water Hardness Pre-Laboratory Questions Name Section 1. Part of a buret measuring in mL is shown below. Read the volume to the proper number of significant digits. Volume 2. Suppose it takes 33.69 mL of 0.005123 M EDTA to titrate 25.00 mL of a hard water solution. a) How many moles of EDTA were required to titrate to the endpoint? b) How many moles of hard water ions, expressed as moles of Ca?", are present in the hard...
14. When 10.0 grams of Na2S04 is dissolved to 500. mL with water: c. What is...
14. When 10.0 grams of Na2S04 is dissolved to 500. mL with water: c. What is the molarity of sodium sulfate? d. What is the molarity of sodium ion in the solution? e. What is the molarity of sulfate ion in the solution? 15. You want to perform a chemical reaction and you need 15.0 grams of silver for the reaction to produce the desired yield of product. How much of a 0.75 M silver nitrate solution will you need...
Section Laboratory Caleulations 1.A.0 ml sample of NaCl solution was 5057 grams. When the water was evaporated, the residual salt weighed 1.285 grams (10 pts) Fill in the data table below using the information given Mass of salt solution Mass of NaCl Mass of water Volume of solution Using the information from the data table, calculate: a. The % weight-weight of NaCl in the solution. b. The grams of NaCl per 100 grams of water. C. The molarity of the...
om 4. In the structural features of sw a welch of the following was to distinguish reducing monosaccharides freeding disaccharides? (a) Benedict's Test (e) ladine Test (b) Molisch Test (d) Barfoed's Test is indicate 3. In the Seliwanoll's test, a positive result for the presence of ketohexos what color? (a) purple (c) dark reddish brown (b) red-orange (d) greenish-blue 6. Vitamin C is also known as (a) sodium hydroxide (b) sulfuric acid (e) ascorbic acid (d) glucose 7. The oxidation...
10. Volume of sample in liters 11. Molarity of NaCl solution (Show calculations.) Questions and Problems 05 A 15.0-ml sample of NaCl solution has a mass of 15.78 g. After the NaCl solu- tion is evaporated to dryness, the dry salt residue has a mass of 3.26 g. Calculate the following concentrations for the NaCl solution. a. % (m/m) b. % (m/v) c. molarity (M) Q6 How many grams of KI are in 25.0 mL of a 3.0% (m/v) KI...
A 12.34 mL solution with an unknown salt concentration had a mass of 10.25 g. When the water was evaporated from the solution. 4.78 g of NaCl remained. a Calculate the mass-mass percent NaCl concentration in the solution. Show your work. b Calculate the mass-volume percent NaCl concentration in the solution. Show your work. Calculate the molarity of NaCl in the solution. Show your work.
17) How many grams of water are in 250.0 g of a 5% by mass solution? How many grams of sugar are in this solution? 18) A solution is prepared with 45.0 g of NaCl in enough water to make a 50mL solution. What is the molarity of the solution? 19) If 345 g of MgCl, solution is evaporated and 32.8 g of magnesium chloride are collected. What is the mass percent of the salt in the solution? How much...
Johnny wished to create a 0.300 M NaCl solution. Johnny only had 50.0 mL of water, however. To create his goal solution, Johnny knew he needed to know the molar mass of NaCl, which was [Select ] Next, to find the the number of moles of Naci he needed, Johnny simply multiplied the [Select] by the volume of water, in liters, which was [Select) L. Then, he calculated the number of grams of NaCl he needed taking this number of...
need help with questions 3,4,5
Laboratory Questions: Saturated Solutions The data below was collected in an experiment to determine the solublity of sodium nitrate at 20 C. Total Volume of Water (mL) Saturation Temp (C Solubility (g salt/100g water) 3.50 139.3 78.0 3.75 70.0 4.00 60.0 121.8 4.25 52.0 4.50 45.0 08. 3 4.75 5.00 36.0 Na NO3 73 1. If 4.8739 g of NaNO, was used, calculate the solubility in units of g NaNO,/100 g water at each saturation...
Experiment 9: Water Hardness Pre-Laboratory Questions Name Section 1. Part of a buret measuring in mL is shown below. Read the volume to the proper number of significant digits. Volume 2. Suppose it takes 33.69 mL of 0.005123 M EDTA to titrate 25.00 mL of a hard water solution. a) How many moles of EDTA were required to titrate to the endpoint? b) How many moles of hard water ions, expressed as moles of Ca?", are present in the hard...
14. When 10.0 grams of Na2S04 is dissolved to 500. mL with water: c. What is the molarity of sodium sulfate? d. What is the molarity of sodium ion in the solution? e. What is the molarity of sulfate ion in the solution? 15. You want to perform a chemical reaction and you need 15.0 grams of silver for the reaction to produce the desired yield of product. How much of a 0.75 M silver nitrate solution will you need...
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