biochem lab final exam

Calculate the concentration of Ca**, Cl in mM/L and meq/L; and hardness in mg/L as CaCO3 produced by the addition of 200 mg/L CaCl, to pure water.

Solubility of an Unknown Solute 08 60 Solubility (g solute / 100g H,0) 40 10 20 30 40 50 60 70 80 90 100 Temperature (°C) According to the solubility curve above, dissolving 20 grams of solute in 100g of water at 50°C would make a solution that was [ Select] Dissolving 50g of solute in 100g of water at 60°C would [ Select] [Select] saturated unsaturated supersaturatcd 20

Complete the table. Use up to four decimal places.

w w w w w T Concentration (grams/kg H₂O) 1000 900 800 700 600 500 400 300 200 100 0 0 Solubility Curve for Potassium Dichromate (K₂Cr₂O₂) 10 20 30 40 50 60 70 80 90 100 Temperature (Celsius) Use the solubility curve for questions 22-25. You put 480 g K₂Cr₂O, in 1 kg of water? At which temperature will the 22. solution be saturated? A. 40 °C B. 70 °C C. 1000 °C D. Equal amounts of K₂Cr₂O; will dissolved at all of the listed temperatures. You put 150 g K₂Cr₂O7 in 1 kg of water? At which temperature will the 23. solution be saturated? A. 30 °C B. 50 °C C. 80 °C D. K₂Cr₂O, will dissolved equal fast at all of the listed temperatures.

Look at the diagram below of a ten-fold serial dilution. Serial Dilution 1 mL stock 9 mL stock solution & 9 ml saline 9 mL saline 9 mL saline 9 mL saline 9 mL saline solution solution solution solution solution 1 mL D2 solution to D3 1 mL D3 solution to D4 1 mL D4 solution to D5 1 mL D5 solution to waste D1 D2 D3 D4 D5 D6 In this diagram, D1 is the original solution. For a ten-fold serial dilution, first add 9 mL of solvent (eg. Saline) to 5 new tubes marked D2-D6. Take 1 mL of D1 solution, add to tube D2 and mix. Take 1 mL of D2, add to D3, and mix. Take 1 mL of D3, add to D4, and mix. Take 1 mL of D4, add to D5, and mix. Take 1 mL of D5, add to D6, and mix. Problem 2. If tube D1 has 100% concentration, then what is the % concentration of tube D2? tube D3? tube D4? tube D5?

Please help me with the last box form the trail.

Answer #6

Hw.39.

5. You are making ampicillin plates. Before pouring the plates, you add 2 mL of 10 mg/mL to the 400-ml bottle of LB agar that you use to pour the plates. What is the final concentration of the ampicillin in the plates? Express your answer as ug/mL. Show your work.

1. What is the final volume V2V2V_2 in milliliters when 0.916 LL of a 47.7 %% (m/v) solution is diluted to 20.9 %% (m/v)?   2. A 809 mLmL NaClNaCl solution is diluted to a volume of 1.40 LL and a concentration of 5.00 MM . What was the initial concentration C1C1C_1?

Concentration of Acetic Acid in a Vinegar Solution. Average molarity of NaOH Volume HC₂H30₂ sample Final buret reading Initial buret reading Volume NaOH (Show all units and all calculations) Molarity of HC₂H30₂ (unrounded) Average molarity of HC₂H302 (unrounded) Deviations Average deviation Best estimate for molarity of HC₂H302 Average mass percent HC₂H302 46.4mL Oml Ran out of Base ↓ ↓ ↓ ↓ 10.014 HOA je beart giov isults weari?! ferottelucuny Cambia) 10 Kousad Question 1. A Rolaids tablet contains calcium carbonate that neutralizes stomach acid. If 44.55 mL of 0.448 M hydrochloric acid is required to neutralize one tablet, how many milligrams of calcium carbonate are in a Rolaids tablet? CaCO, (s) + 2HCl(aq) → CaCl₂ (aq) + H₂O (1) + CO₂ (g)

Please don't provide handwritten solution...

Exercise 14.72 - Enhanced - with Feedback MISSED THIS? Watch KCV: Solution Concentration: Molarity, Molality, Parts by Mass and Volume, Mole Fraction, IWE: Converting between Concentration Units; Read Section 14.5. You can click on the Review link to access the section in your e Text. One brand of laundry bleach is an aqueous solution containing 4.00% sodium hypochlorite (NaOCI) by mass. < Previous OL ASU

A 2.6 g sample of plant tissue was analyzed and found to contain 3.6 mg zinc, what is the concentration of zinc in the p ?lant in ppm .A ppm 3^10x1.384 .B ppm (3-)^10x1.384 .C ppm 1.384 .D

You are creating a standard curve for a protein experiment. You have to stock solution of BS a and would like to obtain dilutions. Explain how you would create a 1:1000 dilution of your protein stock solution.

I need help completing a lab report for chemistry. I attached assignment questions and lab obervations. Important notes:  - The salt I worked with was a hydrated CaCl2*(H2O)2 salt. - Density for 1st diluted salt solution was 0.968g/mL, mixed 22mL of salt solution with 6mL of water - Density for 2nd diluted salt solution was 0.944g/mL, mixed 15mL of salt solution with 13mL of water -Density for 3rd diluted salt solution was 0.956g/mL, mixed 8mL of salt solution with 20mL of water

chools.schoology.com/common-assessment-delivery/start/4573067641?action%3Donresume&submissionld%3547892539 150 140 130 120 110 100 NANO 90 80 70 60 NH C Ka Náci 50 40 30 20 KCIÓ, 10 Cez(so 10 20 30 40 50 60 70 80 90 100 Temperature (C) The compound with the least solubility at 50 °C is OKI O NANO3 O KNO3 O NH3 O NH&CI O KCI O NaCI O KCIO3 O Cex(SOa)a DELL & Grams of solute

C. Electrolytes in Body Fluids 1. Type of IV Solution 5% Isolute P (mEa/L) Plasnalyte (mEg/L) Lactated Ringer's (mEg/L) Nal+ = 130 Klt = 4 Ca2+ = 3 Nal+ = 25 K+ = 20 Nal+ = 140 Kl+ = 5 2. Cations %3D %3D Mg+ = 3 Mg2+ = 3 CI- = 22 HPO- =3 Acl- = 23 CI- = 98 Glu'-= 23 Acl- = 27 3. Anions CI'- = 109 %3D HPO = 28 %3D %3D 4. Total Charge of Cations (+) 137 137 5. Total Charge of Anions (-) 6. Sum of the Charges Copyright 2014 Pearson Education, Inc.

d. 1.10 g of K3PO4 in 430.0 mL of solution Mx+ =| M %3D Mpo, M

Calculate the concentration of Ca**, Cl in mM/L and meq/L; and hardness in mg/L as CaCO3 produced by the addition of 200 mg/L CaCl, to pure water. 4:39 PM

please calculate the concentration in ppm (last column) for each solution

4G 11:40 9 O, 0.00 KB/s 52 education.wiley.com/wa 22 E FA 11 7 of 17 - /2 View Policies Current Attempt in Progress What volume of water at 20.0 °C (d = 0.9982 g cm 3) is needed to dissolve 47.1 g of sucrose to make a 20.5 %(w/w) solution? Volume of water = i mL eTextbook and Media Hint Save for Later Attempts: 0 of 3 used Submit Answer WP WP WP + II

A 1 mL sample of glycogen was calculated to contain 35 µmol (micromole) glucose. To 1 mL of this sample was added 2 mL of 2 M HCL. It was then hydrolysed by boiling the solution for 15 minutes. After boiling the hydrolysate was cooled and made up with H2O to a final volume of exactly 10 mL. The glucose was measured in this solution and found to have a concentration of 570 µg/mL (microgram/milliliter). i) Calculate the mass (mg) of glucose in the 10 mL of hydrolysate. As the 1mL of glycogen sample was made up to a final volume of 10 mL, this mass of glucose was produced by the hydrolysis of the original 1 mL glycogen sample. ii) Calculate the amount (µmol) of glucose produced by the hydrolysis of the glycogen sample. iii) Calculate the purity of the glycogen used in the sample as % Purity = (moles of measured glucose/ moles of calculated glucose in glycogen) *100 iv) state your answer in a complete sentence.

A reagent bottle contains 250 cm3 of 0,4 mol.dm–3 oxalic acid(C2O4H2) solution. Calculate the mass of pure oxalic acid thatmust be dissolved in this solution so that its new concentration is 0,6 mol.dm–3. Assume that the volume of the solution remainsconstant

2

2. An 88-pound patient will be receiving aztreonam 30 mg/kg (MAX 1 gram) in 100 mL D₁0W. MWaztreonam = 435.43 g/mol General Structure: aztreonam a. If you have aztreonam 40 mg/mL in stock, calculate the appropriate volume, in milliliters, of the stock solution the patient should receive. b. Fill in the values on the table.

2

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

A 1 mL sample of glycogen was calculated to contain 21 µmol (micromole) glucose. To 1 mL of this sample was added 2 mL of 2 M HCl. It was then hydrolysed by boiling the solution for 15 minutes. After boiling the hydrolysate was cooled and made up with H2O to a final volume of exactly 10 mL. The glucose was measured in this solution and found to have a concentration of 340 µg/mL (microgram/milliliter). i) Calculate the mass (mg) of glucose in the 10 mL of hydrolysate. As the 1 mL of glycogen sample was made up to a final volume of 10 mL, this mass of glucose was produced by the hydrolysis of the original 1 mL glycogen sample. ii) Calculate the amount (µmol) of glucose produced by the hydrolysis of the glycogen sample. iii) Calculate the purity of the glycogen used in the sample as % Purity = (moles of measured glucose/ moles of calculated glucose in glycogen) *100 iv) state your answer in a complete sentence. Show your working out such that the marker can easily understand it.…

Using your graph, calculate the osmosis rate for each solution (cm the column rose/amount of time-this is the slope of your line)

Hello! Please answer these three questions. Refer to the table above.

Predict the rates of pressure change if the tubing is placed in an insulated cup holding 1000 mL of 37oc water. Explain your reasoning.  Predict the rate of pressure change if the tubing were filled with 10 mL of 0.8 M sucrose solution and 5 mL of 1.0 M sodium chloride solution. Explain your reasoning.