no. mole (ascorbic acid) = no. mole (NBS) no. mole (ascorbic acid) = hey i'm...
no. mole (ascorbic acid) = no. mole (NBS) no. mole (ascorbic acid) =
hey i'm having some trouble understanding how to find the concentration of the nbs X volume used. i;m assuming the the average of the the concordant titres is the volume used but i don't know what the concentration of NBS is
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no. mole (ascorbic acid) = no. mole (NBS) no. mole (ascorbic
acid) =
hey i'm...
Using the volumes of NBS solution you just entered and the average molarity of the NBS standard solution, calculate...
Using the volumes of NBS solution you just entered and the average molarity of the NBS standard solution, calculate the milligrams of ascorbic acid in the 10.00 mL Vitamin C sample for each trial. Enter your calculated milligrams of ascorbic acid in the 10.00 mL Vitamin C sample, for each trial. Be sure to enter your calculated milligrams in the corresponding order that you entered your NBS volumes previously. The NBS volume you entered for entry #1 previously should correspond...
ascorbic acid (vitamin C, MM= 176.126 g/mole) is a reducing agent, reacting as follows: C6H8O6 ---->...
ascorbic acid (vitamin C, MM= 176.126 g/mole) is a reducing agent, reacting as follows: C6H8O6 ----> C6H6O6 + 2H+ + 2e- the concentration of ascorbic acid can be determined by oxidation with a standard solution of I2 (2 I- ---> I2 +2e-). A 200.0 mL sample of citrus fruit drink is acidified and 10.00 mL of 0.0500 M I2 is added. after the reaction is complete, the excess I2 is titrated with 38.62 mL of 0.0120 M Na2S2O3 according to...
Hey all, I'm having some trouble with numbers 3 & 4. I feel like I'm missing...
Hey all, I'm having some trouble with numbers 3 & 4. I
feel like I'm missing something and need some help. Thanks!!
3. Give the quantum number designations of n, l, m, of the following orbitals and list the possible m values. 40 n. 2s n, 1 5dn, mi mi 4. Draw out approximate shapes of the following atomic orbitals indicating locations of planar and radial nodes. 4 dx2-y2 3py
I'm not sure about how I'm supposed to find NaOH concentration from a strong acid and...
I'm not sure about how I'm supposed to find NaOH
concentration from a strong acid and strong base titration. I'm
thinking that 2.5×10^-8 mol per L that I calculated would make the
moles of NaOH 2.5x10^-8 mol since it's a one to one
ratio.
Hydrochloric acid titration: Confirming the concentration of NaOH Concentration of HCl solution from the stock bottle: _ 0.OSM! Initial pH of HCl solution: 1.66 pH Volume NaOH (mL) Concentration of NaOH (M) Non Phenolphthalein (end point)...
Biochemistry Question: I'm having trouble understanding how to calculate % yield with the given i...
Biochemistry Question:
I'm having trouble understanding how to calculate %
yield with the given information (Volume & Concentration), I
don't necessarily need the answers, but I'd like to know how to
calculate them. Additionally, while I'm asking this, how could one
evaluate those results to determine if the purification was 'good'
or not?
Thank you
S., Finish this protetn purification table: (4 pts) volume 10 ml 12.5 Fraction 56.3 25.36 Homogenate DEAB Gel filtration Was this a 'good purification? Evaluate...
Ascorbic Acid Concentration (g/L) Volume of DCPIP in Full Syringe Used (mL) Volume of DCPIP in...
Ascorbic Acid Concentration (g/L)
Volume of DCPIP in Full Syringe Used (mL)
Volume of DCPIP in Final Syringe (mL)
Total Volume of DCPIP Used (mL)
0.0
5 mL
4.9 mL
0.1 mL
0.50
5 mL
2 mL
3 mL
1.00
5 mL
1.2 mL
3.8 mL
1.50
5 mL
3.6 mL
6.4 mL
2.00
5 mL
2.8 mL
7.2 mL
Unknown Trial 1
5 mL
2.0 mL
3.0 mL
Unknown Trial 2
5 mL
2.2 mL
2.8 mL
Unknown Trial...
You run a titration experiment to determine the mass of ascorbic acid (MM=176.12 g/mole) in a...
You run a titration experiment to determine the mass of ascorbic acid (MM=176.12 g/mole) in a vitamin C tablet. The tablet was dissolved in 100mL of water and the titration required 23.0 mL of 0.5M NaOH for complete neutralization of the acid, according to the following reaction: AscH2 (aq) + 2NaOH (aq) -> Asc^2- (aq) + 2H2O (l) + 2Na^+ (aq) a) Calculate the moles of NaOH used. b) Calculate the moles of acid in the solution. c) Calculate the...
I'm having trouble with these questions from the lab: polyprotic acids: titration of phosphoric acid and...
I'm having trouble with these questions from the lab: polyprotic acids: titration of phosphoric acid and determination of the molar concentration of phosphoric acid in cola. 3.A student titrated 25.00 mL of cola and it required 18.27 mL of 0.0100 M NaOH to reach the 1st equivalence point. Calculate the molar concentration of phosphoric acid in this brand of cola. 4. If the density of the "Cola" drink is 1.00 g/mL. What is the mass percent of phosphoric acid in...
I am doing a titration lab using sodium thiosulfate pentahydrate to determine an amount if iodine....
I am doing a titration lab using sodium thiosulfate pentahydrate to determine an amount if iodine. I'm having issues setting up the balanced equation to determine the mole ratio of iodine to thiosulfate. I used an approximate .080M solution of Sodium Thiosulfate and then titrated into a flask containing 25mL of KIO3, 20mL H2SO4 and 2g KI. Final mL of Sodium Thiosulfate used to complete titration was 37.36mL of Na2S2O3 5H20. I then did the same process for a 25mL...
Vitamin C (ascorbic acid) from foods can be measured by titration with I3-If 29.41 mL of...
Vitamin C (ascorbic acid) from foods can be measured by titration with I3-If 29.41 mL of I3- solution are required to react with 0.1970 g of pure ascorbic acid, what is the molarity of the I3- solution? A vitamin C tablet containing ascorbic acid plus inert binder was ground to a powder, and 0.4242 g was titrated by 31.63 mL of I3-. How many moles of ascorbic acid are present in the 0.4242 g sample? Find the weight percent of...
Hey all, I'm having some trouble with numbers 3 & 4. I
feel like I'm missing something and need some help. Thanks!!
3. Give the quantum number designations of n, l, m, of the following orbitals and list the possible m values. 40 n. 2s n, 1 5dn, mi mi 4. Draw out approximate shapes of the following atomic orbitals indicating locations of planar and radial nodes. 4 dx2-y2 3py
I'm not sure about how I'm supposed to find NaOH
concentration from a strong acid and strong base titration. I'm
thinking that 2.5×10^-8 mol per L that I calculated would make the
moles of NaOH 2.5x10^-8 mol since it's a one to one
ratio.
Hydrochloric acid titration: Confirming the concentration of NaOH Concentration of HCl solution from the stock bottle: _ 0.OSM! Initial pH of HCl solution: 1.66 pH Volume NaOH (mL) Concentration of NaOH (M) Non Phenolphthalein (end point)...
Biochemistry Question:
I'm having trouble understanding how to calculate %
yield with the given information (Volume & Concentration), I
don't necessarily need the answers, but I'd like to know how to
calculate them. Additionally, while I'm asking this, how could one
evaluate those results to determine if the purification was 'good'
or not?
Thank you
S., Finish this protetn purification table: (4 pts) volume 10 ml 12.5 Fraction 56.3 25.36 Homogenate DEAB Gel filtration Was this a 'good purification? Evaluate...
Ascorbic Acid Concentration (g/L)
Volume of DCPIP in Full Syringe Used (mL)
Volume of DCPIP in Final Syringe (mL)
Total Volume of DCPIP Used (mL)
0.0
5 mL
4.9 mL
0.1 mL
0.50
5 mL
2 mL
3 mL
1.00
5 mL
1.2 mL
3.8 mL
1.50
5 mL
3.6 mL
6.4 mL
2.00
5 mL
2.8 mL
7.2 mL
Unknown Trial 1
5 mL
2.0 mL
3.0 mL
Unknown Trial 2
5 mL
2.2 mL
2.8 mL
Unknown Trial...
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