Explain in detail how you would make the solution from the previous question (50.00 mL a 300 ug/dL solution from a 1500 ug/dL stock solution). O a. Pipette 10.0 mL of 1500 pg/dL stock solution into a 50.00 mL graduated cylinder. Carefully, fill the cylinder to the 50.00 mL line with dH20. O b. Pipette 10.0 mL of 1500 ug/dL stock solution into a 50.00 mL volumetric flask. Carefully, fill the flask to the 50.00 mL line with dH20. O c. Pipette 10.0 mL of 1500 ug/dL stock solution into a beaker. Measure out 40.0 mL of dH20 and add to the beaker. O d. Using a graduate cylinder, measure out 10.0 mL of 1500 µg/dL stock solution and measure out 40.0 mL of dH,0. Put both in a beaker and mix.

Qestion attached

Hw.39.

part 1 What is the % w/v of a 200ml solution containing 50g sucrose? part 2 What is the % w/v of a 2.5L solution containing 26.45g of SDS? part 3 How many grams of CaCl2 are required to produce 300 mls of a 10%w/v of CaCl2 solution.

Please don't provide handwritten solution...

Are these correct? The top page of the second paper is the second problem.

5. The mineral analysis below was reported for a water sample. Calcium 90 Chloride 120 Magnesium 30 Sulfate 170 Iron (Fe**) 5 Bicarbonate 165 Sodium 10 pH 7.5 units Potassium 6. Note: All reported as "mg/L as the ion" unless stated otherwise. Draw a bar chart that includes all the ions listed above. (Remember to convert to appropriate units) b. What is the total hardness of the water using ALL multivalent cations in mg/L as а. CACO3? c. What is the total hardness of the water using the predominant polyvalent cations in mg/L as CaCO3? d. What is the percent error in using only the predominant polyvalent cations? e. What is the carbonate hardness of the water in mg/L as CaCO3? f. What is the non-carbonate hardness of the water in mg/L as CACO3?

Biological studies have found that aqueous solutions containing as little as 28 µg of allicin per milliliter inhibit bacterial growth. Express this amount as the number of moles of allicin per liter of solution. \(28~\text{ug/mL}=\) \(text{mol/L}\) 20 F3 II F8 F4 F5 F6 F7 F9 F10 F11 F12 & %24 4. 3 5 7 9 { } P E T Y U %3D * CO R %23

number 15 (POST) please answer A&B ! thank you!

Determine a procedure to accurately create a 1.5•10^-6 mg Fe/mL solution using a 0.0500 mg Fe/mL standard solution and only having access to 100.0 mL volumetric flasks and 1.00, 2.00, 3.00, 4.00, 5.00 and 10.00 mL volumetric pipets. (You may have it make more than one solution by dilution to accomplish this)