6 There are O.027g of lactic acid (GsHos) found in a 250 mL blood serum sample.

Question

6 There are O.027g of lactic acid (GsHos) found in a 250 mL blood serum sample. ) found in a 250 mL sample. a. What is the lactic acid concentration in molarity b. if the normal range for lactic acid is 0.60 to 1.8 mmol/L, is this sample within the normal range. Show the conversion of the lactic acid concentration to mmol/L to support your answer. 7. A diabetic patient suffering from hyperglycemia is receiving an insulin solution by IV at a rate of 2.3 ml/hr. The concentration of the insulin solution is 200. units in every 500. mL. How many units of insulin per hour is the patient receiving? 8. Calculate the %(m/V) ifthere are 6.8 g casein in 150 mL of low-fat milk. 9. How many grams of FeSOs are present in a 35 mL sample of a O.50M solution 10. A 1.0 L solution contains 2.50 g of HPO2. How many mEq of biphosphte are in this 1.0 L solution

Explanation / Answer

Ans 6

Part a

Mass of lactic acid (C3H6O3) = 0.027 g

Moles of lactic acid = mass/molecular weight

= 0.027 g / 90g/mol

= 0.0003 mol

Volume of blood = 250 mL = 0.250 L

Density of blood serum = 1.025 g/mL

Mass = density x volume

= 1.025 g/mL x 250 mL = 256.25 g = 0.25625 kg

Molality = moles of lactic acid / mass of blood serum

= 0.0003 mol / 0.25625 kg

= 0.0011707 m

Part b

Molarity of lactic acid = moles/Volume

= 0.0003 mol / 0.250 L

= 0.0012 mol/L x 1000mmol/mol

= 1.2 mmol/L

The sample is in the normal range of 0.60 to 1.8 mmol/L

Related Questions

Navigate

• Browse (All)
• Browse 6
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.