How do you determine the concentration in well that contains 30 mL of water, and 30...
How do you determine the concentration in well that contains 30 mL of water, and 30 mL of a green stock solution (0.010%(m/v))?
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How do you determine the concentration in well that contains 30
mL of water, and 30...
Experimental sucrose solution (final concentration) 30% 15% Amount of 30% stock sucrose solution needed 5 mL...
Experimental sucrose solution (final concentration) 30% 15% Amount of 30% stock sucrose solution needed 5 mL 2.5 mL 0.5 mL Amount of water needed O mL 2.5 mL 4.5 mL 3% 12. Make an additional 200 mL of 15% sucrose solution in Beaker 1 by mixing the 30% stock solution with water. Use the following dilution equation to solve for the necessary amount of stock solution MV, = M2V2 Where: • V1 = Needed volume of stock solution M =...
You are measuring the calcium concentration of a well to determine how hard the water is....
You are measuring the calcium concentration of a well to determine how hard the water is. Which of the following measurement methods should you use to get the concentration of the calcium in the water using a calcium ion selective electrode A standard additions curve A calibration curve Neither Both
1. How would you prepare 125 ml of a 10% (v/v) solution of acetic acid in...
1. How would you prepare 125 ml of a 10% (v/v) solution of acetic acid in H2O? 2. How would you prepare 60 ml of a 5% (W/V) NaCl solution in H20? 3. How would you prepare 3 ml of 82% solution A and 18% solution B? 4. 5 ml of a 2.0 mg/ml protein solution contains mg protein. a. If 1.0 ug/ml of pigment X shows an absorbance of 0.059 at 370nm, then what is the concentration of a...
You wish to measure the iron content of the well water on the new property you...
You wish to measure the iron content of the well water on the new property you are about to buy. You prepare a reference standard Fe3+ solution with a concentration of 7.57×10−4 M. You treat 10.0 mL of this reference with HNO3 and excess KSCN to form a red complex and dilute the reference to 50.0 mL. The diluted reference is placed in a cell with a 1.00‑cm light path. You then take 30.0 mL of the well water, treat...
If you add 50 mL of water to 30 mL of a 4.0 % solution. What...
If you add 50 mL of water to 30 mL of a 4.0 % solution. What will be the concentration of the diluted solution?
You wish to measure the iron content of the well water on the new property you...
You wish to measure the iron content of the well water on the new property you are about to buy. You prepare a reference standard Fe3+ solution with a concentration of 7.10 x 10-4 M. You treat 15.0 mL of this reference with HNO3 and excess KSCN to form a red complex and dilute the reference to 50.0 mL. The diluted reference is placed in a cell with a 1.00-cm light path. You then take 25.0 mL of the well...
Making Solutions Practice Problems: I. How would you prepare 100 ml of a 30% (w/v) solution...
Making Solutions Practice Problems: I. How would you prepare 100 ml of a 30% (w/v) solution of polyethylene glycol (PEG)? 2. How would you prepare 50 ml of a 9 % (w /v ) solution of NaCI? 3. How would you prepare 200 ml of 70 % ( v /v ) solution of ethanol from a stock of 95% ethanol? How would you prepare 200 ml of 0.3 M NaCl? (NaCl MW 58.44) 4. 5. How are 50 ml of...
You wish to measure the iron content of the well water on the new property you...
You wish to measure the iron content of the well water on the new property you are about to buy. You prepare a reference standard Fe3t solution with a concentration of 7.26 x 104 M. You treat 12.0 mL of this reference with HNO3 and excess KSCN to form a red complex, and dilute the reference to 60.0 mL. The diluted reference is placed in a cell with a 1.00-cm light path. You then take 30.0 mL of the well...
the concentration in %(m/v) of a solution prepared by dissolving 50.0 sucrose in 220 mL of...
the concentration in %(m/v) of a solution prepared by dissolving 50.0 sucrose in 220 mL of ethanol. hat is the concentration in ppm of a solution that contains 0.234 g of lactic acid dissolved in 350 mL of aqueous solution? h) How many grams of glucose are present in 850 mL of a 4.25%(m/v) glucose solution. 8. The following questions involve calculations of equivalents or miliequivalents. a) How many equivalents of sodium ion and sulfate ion are present in a...
a. What is the new % (m/v) concentration when water is added to 25.0 mL of...
a. What is the new % (m/v) concentration when water is added to 25.0 mL of 20.0% (m/v) NaOH to make 300.0 mL of a diluted NaOH solution? b. What is the new molarity of the solution when water is added to 125.0 mL of 2.50 M NaOH to make 300. mL of a diluted NaOH solution?
Experimental sucrose solution (final concentration) 30% 15% Amount of 30% stock sucrose solution needed 5 mL 2.5 mL 0.5 mL Amount of water needed O mL 2.5 mL 4.5 mL 3% 12. Make an additional 200 mL of 15% sucrose solution in Beaker 1 by mixing the 30% stock solution with water. Use the following dilution equation to solve for the necessary amount of stock solution MV, = M2V2 Where: • V1 = Needed volume of stock solution M =...
1. How would you prepare 125 ml of a 10% (v/v) solution of acetic acid in H2O? 2. How would you prepare 60 ml of a 5% (W/V) NaCl solution in H20? 3. How would you prepare 3 ml of 82% solution A and 18% solution B? 4. 5 ml of a 2.0 mg/ml protein solution contains mg protein. a. If 1.0 ug/ml of pigment X shows an absorbance of 0.059 at 370nm, then what is the concentration of a...
You wish to measure the iron content of the well water on the new property you are about to buy. You prepare a reference standard Fe3+ solution with a concentration of 7.10 x 10-4 M. You treat 15.0 mL of this reference with HNO3 and excess KSCN to form a red complex and dilute the reference to 50.0 mL. The diluted reference is placed in a cell with a 1.00-cm light path. You then take 25.0 mL of the well...
Making Solutions Practice Problems: I. How would you prepare 100 ml of a 30% (w/v) solution of polyethylene glycol (PEG)? 2. How would you prepare 50 ml of a 9 % (w /v ) solution of NaCI? 3. How would you prepare 200 ml of 70 % ( v /v ) solution of ethanol from a stock of 95% ethanol? How would you prepare 200 ml of 0.3 M NaCl? (NaCl MW 58.44) 4. 5. How are 50 ml of...
You wish to measure the iron content of the well water on the new property you are about to buy. You prepare a reference standard Fe3t solution with a concentration of 7.26 x 104 M. You treat 12.0 mL of this reference with HNO3 and excess KSCN to form a red complex, and dilute the reference to 60.0 mL. The diluted reference is placed in a cell with a 1.00-cm light path. You then take 30.0 mL of the well...
the concentration in %(m/v) of a solution prepared by dissolving 50.0 sucrose in 220 mL of ethanol. hat is the concentration in ppm of a solution that contains 0.234 g of lactic acid dissolved in 350 mL of aqueous solution? h) How many grams of glucose are present in 850 mL of a 4.25%(m/v) glucose solution. 8. The following questions involve calculations of equivalents or miliequivalents. a) How many equivalents of sodium ion and sulfate ion are present in a...
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