I am doing an experiment to find out the content of phosphate composition in cola beverage...
I am doing an experiment to find out the content of phosphate
composition in cola beverage by UV-visible spectrophotometry and pH
titrimetry
And I find the different:
7.05 x 10-3 (from UV-visible spectrophotometry) - 6.32 x 10-3 (pH titrimetry)
=7.3 x 10-4 M
Why there is such a difference for concentration using UV-visible
spectrophotometry was greater than pH titrimetry? Thank You.
Homework Answers
Ph terimetry was not so
efficient method due to external reagents like indicator which can
affect the result.
Add Answer to:
I am doing an experiment to find out the content of phosphate
composition in cola beverage...
Can someone help me out with part b? I am not sure what I am doing...
Can someone help me out with part b? I am not sure what I am
doing wrong. the first answer I got was 22 degrees and that wasn't
right either.
Thank you for your help.
2 2/4 points Previous Answers My Notes Ask Your Teacher - 70.00 kgs at another corner, and a my 115.00 kg mass the third comer Find the magnitude and An equilateral triangle 10 mon a side has am 30.00 kg mass at one corner, am...
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I am doing the experiment, "Determination of Specific
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specific heat capacity of the unknown metal is. Thank you!
Table 2: Mass Mass (g) Water 49.7 10.3 Unknown Metal Strip Table 3: Specific Heat Data Temperature (°C) Time (minutes) Trial 1 Trial 2 Trial 3 Initial 24. 24.0 25.0 5 minutes 25.0 6 minutes 25.0 26.1 27.0 27.0...
2 Short Answer Questions: Worth 3.5 points each 1. In the reaction H:CO, + HO HCOS...
2 Short Answer Questions: Worth 3.5 points each 1. In the reaction H:CO, + HO HCOS + H0", the Bronsted acids are a. H-COs and H:O 5. H O" and H:CO c. HCOs and H:COs d. H:COs and HCOs 2. Which one of these statements about strong acids is trac All strong acids have H atoms bonded to electronegative oxygen atoms Strong acids are 100 % ionized in water Strong acids are very concentrated acids Strong acids produce solutions with...
this is part 1. What am i doing wrong? Attached my previous answers part 2 Part...
this is part 1. What am i doing wrong? Attached my previous
answers
part 2
Part B Calculate the molar solubility of Ni(OH), when buffered at pH = 10.3. Express your answer using one significant figure. O A 0 2 ? 1.0 • 10-8 Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining Submitted Answers ANSWER 1: Deduction: -3% 1.51-10-* M You are given a pl value, which can be used to calculate the OH . This...
I forgot to put down that the observance (=OD) at 280nm is 0.679A Experiment 8: Bradford...
I forgot to put down that the observance (=OD) at 280nm is
0.679A
Experiment 8: Bradford assay and UV-method for determination of protein concentrations Materials - An ice bucket with ice, your purified sample, three visible plastic cuvettes for Bradford assay, one UV plastic cuvette for UV-method, a piece of parafilm, a Vis-spec, a Lab Quest, Bradford reagent, white tape (share), a sharpie. Bradford assay (reference 21) 1. Add 990 uk Bradford assay reagent to a plastic cuvette 2. Blank...
am I doing thos correctly? can you help me with the last question and correct me...
am I doing thos correctly? can you help me with the last question
and correct me if i am wrong with the other 2? thank you!
198 4. A hydrate of zinc sulfate, ZnSO4 XH20, decomposes to produce 43.9 % water. Calculate the water of crystallization (X), and write the formula for the hydrate. Imol Hao 2.44mol H20 0aల Znsou x Lmol Znsoy TO1.45,2n so4 1 2n x 5.a0 65.30 16au v 9e,07 96.07 R1.459 100-43.9= 50. 10 43.99H20 x...
9,10,11,12. Not sure I am doing this right. Looking for some assistance. Thank you so much....
9,10,11,12. Not sure I am
doing this right. Looking for some assistance. Thank you so much.
playing catch up due to all the changes.
Tria Aspirin Brand (and amount of acetylsalicylic acid on label) Bayer 2) Average molar concentration of NaOH Solution B (from Part A) Trial 1* T Trial 2 T 3) Mass of aspirin tablet To. 4039 0.4049 4) Mass of pulverized aspirin sample 10. 370g 0,400 5) Initial buret reading 6.03ML 0.56m2 6) Final buret reading 116.88mL...
What am I doing wrong for number 5? I did it exactly like number 4 and the answer is A. review SP19 4. θ is in standard position and its terminal side is defined by the equation 4x-5y-0,x s 0. Make a...
What am I doing wrong for number 5? I did it exactly like number
4 and the answer is A.
review SP19 4. θ is in standard position and its terminal side is defined by the equation 4x-5y-0,x s 0. Make a sketch and indicating θ and find sec6. 5/41 41 4V41 4 a. 41 C. sin =シ 5.) 0 is in standard position and its terminal side is defined by the equation 3x +y and find sin0. 0,x 2...
I am needing help to solve this table. specifically the step 4 portion. My 2 compounds...
I am needing help to solve this table. specifically the step 4
portion. My 2 compounds that I'm using for this experiment are 0.1
M NaHCO3 (acid) and 0.1 M Na2CO3. im having issues finding the
concentration and pKa of everything.
thank you!
Step 1 hydrogen carbonate/carbonate (HCO3/003-) [NaHCO₃ and Nagco ₂] Initial Buffer: Pour 10 mL of the acid component of your buffer into a 50-ml beaker. Add 10 mL of the conjugate base of your buffer, and mix....
Hi I am im a biochemistry lab and we are doing an experiment titled: PCR Amplification...
Hi
I am im a biochemistry lab and we are doing an experiment titled:
PCR Amplification of LeuRS F C Terminal Domain. I am having
troubles figuring out the rest of my caluclations.
I already did the calculations for the first dilution set, I
was wondering how I would do the calculation for the second
dilution set.
Also I was wondering how I would determine the theoretical
values for my data. Is there a specific formula I can use?
If...
Can someone help me out with part b? I am not sure what I am
doing wrong. the first answer I got was 22 degrees and that wasn't
right either.
Thank you for your help.
2 2/4 points Previous Answers My Notes Ask Your Teacher - 70.00 kgs at another corner, and a my 115.00 kg mass the third comer Find the magnitude and An equilateral triangle 10 mon a side has am 30.00 kg mass at one corner, am...
I am doing the experiment, "Determination of Specific
Heat of a Metal". I have completed the physical experiment, I just
need help filling out the last line, determining what the average
specific heat capacity of the unknown metal is. Thank you!
Table 2: Mass Mass (g) Water 49.7 10.3 Unknown Metal Strip Table 3: Specific Heat Data Temperature (°C) Time (minutes) Trial 1 Trial 2 Trial 3 Initial 24. 24.0 25.0 5 minutes 25.0 6 minutes 25.0 26.1 27.0 27.0...
2 Short Answer Questions: Worth 3.5 points each 1. In the reaction H:CO, + HO HCOS + H0", the Bronsted acids are a. H-COs and H:O 5. H O" and H:CO c. HCOs and H:COs d. H:COs and HCOs 2. Which one of these statements about strong acids is trac All strong acids have H atoms bonded to electronegative oxygen atoms Strong acids are 100 % ionized in water Strong acids are very concentrated acids Strong acids produce solutions with...
this is part 1. What am i doing wrong? Attached my previous
answers
part 2
Part B Calculate the molar solubility of Ni(OH), when buffered at pH = 10.3. Express your answer using one significant figure. O A 0 2 ? 1.0 • 10-8 Submit Previous Answers Request Answer X Incorrect; Try Again; 3 attempts remaining Submitted Answers ANSWER 1: Deduction: -3% 1.51-10-* M You are given a pl value, which can be used to calculate the OH . This...
I forgot to put down that the observance (=OD) at 280nm is
0.679A
Experiment 8: Bradford assay and UV-method for determination of protein concentrations Materials - An ice bucket with ice, your purified sample, three visible plastic cuvettes for Bradford assay, one UV plastic cuvette for UV-method, a piece of parafilm, a Vis-spec, a Lab Quest, Bradford reagent, white tape (share), a sharpie. Bradford assay (reference 21) 1. Add 990 uk Bradford assay reagent to a plastic cuvette 2. Blank...
am I doing thos correctly? can you help me with the last question
and correct me if i am wrong with the other 2? thank you!
198 4. A hydrate of zinc sulfate, ZnSO4 XH20, decomposes to produce 43.9 % water. Calculate the water of crystallization (X), and write the formula for the hydrate. Imol Hao 2.44mol H20 0aల Znsou x Lmol Znsoy TO1.45,2n so4 1 2n x 5.a0 65.30 16au v 9e,07 96.07 R1.459 100-43.9= 50. 10 43.99H20 x...
9,10,11,12. Not sure I am
doing this right. Looking for some assistance. Thank you so much.
playing catch up due to all the changes.
Tria Aspirin Brand (and amount of acetylsalicylic acid on label) Bayer 2) Average molar concentration of NaOH Solution B (from Part A) Trial 1* T Trial 2 T 3) Mass of aspirin tablet To. 4039 0.4049 4) Mass of pulverized aspirin sample 10. 370g 0,400 5) Initial buret reading 6.03ML 0.56m2 6) Final buret reading 116.88mL...
What am I doing wrong for number 5? I did it exactly like number
4 and the answer is A.
review SP19 4. θ is in standard position and its terminal side is defined by the equation 4x-5y-0,x s 0. Make a sketch and indicating θ and find sec6. 5/41 41 4V41 4 a. 41 C. sin =シ 5.) 0 is in standard position and its terminal side is defined by the equation 3x +y and find sin0. 0,x 2...
I am needing help to solve this table. specifically the step 4
portion. My 2 compounds that I'm using for this experiment are 0.1
M NaHCO3 (acid) and 0.1 M Na2CO3. im having issues finding the
concentration and pKa of everything.
thank you!
Step 1 hydrogen carbonate/carbonate (HCO3/003-) [NaHCO₃ and Nagco ₂] Initial Buffer: Pour 10 mL of the acid component of your buffer into a 50-ml beaker. Add 10 mL of the conjugate base of your buffer, and mix....
Hi
I am im a biochemistry lab and we are doing an experiment titled:
PCR Amplification of LeuRS F C Terminal Domain. I am having
troubles figuring out the rest of my caluclations.
I already did the calculations for the first dilution set, I
was wondering how I would do the calculation for the second
dilution set.
Also I was wondering how I would determine the theoretical
values for my data. Is there a specific formula I can use?
If...
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