From the Fe2+ concentrations given determine the mg of Fe in the original vitamin tablet. You...

From the Fe2+ concentrations given determine the mg of Fe in the original vitamin tablet. You will need to convert ug/mL into mg of iron. You also have to consider that the original vitamin tablet sample was diluted to 250mL in a volumetric flask and then 5mL of that sample was diluted to 100mL in a volumetric flask. Please show all equations used and work done.

1. Concentration of 0.141738

2. Concentration of 0.1307058

3. Concentration of 0.1354047

Expert Solution

queen_honey_blossom answered 1 year ago

A 100 mg vitamin C tablet weighed 1.627 g. A student crushed the tablet and transferred...

A 100 mg vitamin C tablet weighed 1.627 g. A student crushed the tablet and transferred 0.159 g of the crushed powder into a 100 mL volumetric flask, dissolved the powder in ~30 mL DI water, then filled the flask to the calibration line with DI water and mixed well to create Solution 1. The student then transferred 23.2 mL of Solution 1 into a 100 mL volumetric flask and diluted to the calibration line with DI water to create...

Analytical Chemistry - Determination of Fe in Vitamin tablet: Iron was reduced by 25 mL 6M...

Analytical Chemistry - Determination of Fe in Vitamin tablet: Iron was reduced by 25 mL 6M HCl and DI water. Unknown Iron Sample: 10 mL diluted with DI water in 100 mL volumetric flask, Iron Standards: 30 mL of 0.7385 mM 2 mL of hydroquinone solution, 3 mL o-phenanthroline solution and 10 mL of pH 3.5 buffer added to all flasks. Blank (100 mL volumetric flasks) flask 1 flask 2 flask 3 flask 4 0 mL Standard 50 mL DI...

Determination of Iron in Vitamin Supplements by Spectrophotometric Analysis A tablet containing iron, Fe (II) fumarate...

Determination of Iron in Vitamin Supplements by Spectrophotometric Analysis A tablet containing iron, Fe (II) fumarate (Fe2+C4H2O4 2- ) and binder was dissolved in 0.1M HCl solution and the solution was filtered to remove any insoluble binder Fe (II) in the above step was oxidized with hydrogen peroxide to Fe (III) as follows 2 Fe2+ + H2O2 + H+ → 2 Fe3+ + 2 H2O The solution prepared in above step 3 was transferred to a 1000 mL volumetric flask....

Consider the reaction Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 89 ∘C , where [Fe2+]= 3.00 M and [Mg2+]= 0.110 M...

Consider the reaction Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 89 ∘C , where [Fe2+]= 3.00 M and [Mg2+]= 0.110 M . Part A: What is the value for the reaction quotient, Q, for the cell? Part B: What is the value for the temperature, T, in kelvins? Part C: What is the value for n? Part D: Calculate the standard cell potential for Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s)

Consider the reaction Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 73 ∘C , where [Fe2+]= 3.70 M and [Mg2+]= 0.310 M...

Consider the reaction Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 73 ∘C , where [Fe2+]= 3.70 M and [Mg2+]= 0.310 M . What is the value for the reaction quotient, Q, for the cell? What is the value for the temperature, T, in kelvins? What is the value for n? Calculate the standard cell potential for Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s)

Consider the reaction Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 63 ∘C , where [Fe2+]= 2.90 M and [Mg2+]= 0.210 M...

Consider the reaction Mg(s)+Fe2+(aq)→Mg2+(aq)+Fe(s) at 63 ∘C , where [Fe2+]= 2.90 M and [Mg2+]= 0.210 M . Part A What is the value for the reaction quotient, Q, for the cell? Express your answer numerically. Q = 7.24×10−2 SubmitHintsMy AnswersGive UpReview Part Correct Part B What is the value for the temperature, T, in kelvins? Express your answer to three significant figures and include the appropriate units. T = 336 K SubmitHintsMy AnswersGive UpReview Part Correct Part C What is...

Question 7: (20 marks) The followings are vitamin C concentrations (in mg per 100g) of ten...

Question 7: The followings are vitamin C concentrations (in mg per 100g) of ten tins of tomato juice with the same brand. 16; 22; 21; 20; 23; 21; 19; 15; 13; 22: (4) A researcher wants to test whether the mean is greater than 18mg per 100g. Suggest a statistical test and write down the null hypothesis and the alternative hypothesis. (5) Suppose the researcher chose 5% signicance level and a p-value of 0.15 is obtained from the sample. Should...

Suppose you construct the following galvanic cell: Fe(s)|Fe2+(aq)||NAD+(aq)|NADH(aq) Fe2+ + 2e- → Fe Eo = -0.44V...

Suppose you construct the following galvanic cell: Fe(s)|Fe2+(aq)||NAD+(aq)|NADH(aq) Fe2+ + 2e- → Fe Eo = -0.44V NAD+ + 2e- + 2H+ → NADH + H+ Eo' = -0.320V (note the different standard states) A) Will the cell generate current at biochemical standard state? At chemical standard state? At T = 4 oC, pH = 7? At T = 97 oC, pH = 7? Justify your answers. B) How many protons can be moved across a membrane from pH 7.5 to...

A student was given an old tablet of vitamin C weighed 1.022 g to analyze. The...

A student was given an old tablet of vitamin C weighed 1.022 g to analyze. The tablet was dissolved in 700.0 mL water, and 35.0 mL aliquot of this solution required 45.6 mL of unknown molarity I2 (stock A) solution to oxidize it. In another experiment, the student titrated 50. mL of that same I2 (stock A) with 17.6 mL of 0.0100 M ascorbic acid. Calculate the mg vitamin C in the tablet.

You ground your vitamin C tablet and dissolved it in 250. mL of water in a...

You ground your vitamin C tablet and dissolved it in 250. mL of water in a volumetric flask. You used a 25.0 mL aliquot of this solution for your titration. If it takes 11.50 milliliters of your 0.0151M titrant, how many milligrams of ascorbic acid (MW 176.12) were in the original tablet?

Question