Chemistry: Milliequivalents and Millimoles
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Questions and Answers

What is the concentration of Ca++ ions in terms of mEq/L?

  • 15 mEq/L
  • 10 mEq/L
  • 5 mEq/L (correct)
  • 20 mEq/L

    • What is the weight in mg of 1 mmol of HPO4- (m.w. 96 g/mol)?

  • 96 mg (correct)
  • 480 mg
  • 48 mg
  • 192 mg

    • What is the unit of measurement for osmotic pressure?

  • milliosmoles (mOsmol) (correct)
  • equivalents (Eq)
  • millimoles (mmol)
  • micromoles (μmol)

    • What is the relationship between mmol and mEq for monovalent species?

    <p>numeric values of mmol and mEq are identical</p> Signup and view all the answers

    What is the term for one thousandth of a mole?

    <p>millimole</p> Signup and view all the answers

    How many mmol of monobasic sodium phosphate (m.w. 138 g/mol) are present in 100 g of the substance?

    <p>0.725 mmol</p> Signup and view all the answers

    What is the term for one millionth of a mole?

    <p>micromole</p> Signup and view all the answers

    What is the formula to calculate equivalent weight of a substance?

    <p>MW / valence</p> Signup and view all the answers

    What is the unit of measurement that expresses the chemical activity of an electrolyte?

    <p>Milliequivalent</p> Signup and view all the answers

    What is the formula to convert milligrams (mg) to milliequivalents (mEq)?

    <p>mEq = (mg x valence) / molecular weight</p> Signup and view all the answers

    What is the equivalent weight of an electrolyte?

    <p>Molecular weight / valence</p> Signup and view all the answers

    How many milligrams are equivalent to 8 mEq of potassium (K+)?

    <p>312 mg</p> Signup and view all the answers

    What is the concentration in mg/mL of a solution containing 3 mEq of KCl per mL?

    <p>223.5 mg/mL</p> Signup and view all the answers

    What is the concentration in g/mL of a solution containing 4 mEq of Calcium chloride (CaCl2.2H2O) per mL?

    <p>0.294 g/mL</p> Signup and view all the answers

    A solution has 10 mg / 100 mL of K+ ions. What is the concentration in mEq/L?

    <p>2.56 mEq/L</p> Signup and view all the answers

    What is the concentration in mg/mL of a solution containing 2 mEq of potassium chloride (KCl) per mL?

    <p>149 mg/mL</p> Signup and view all the answers

    What is the primary function of electrolytes in the human body?

    <p>To maintain acid-base balance</p> Signup and view all the answers

    Which of the following is considered a nonelectrolyte?

    <p>Dextrose</p> Signup and view all the answers

    In which unit is electrolyte concentration expressed in the USA?

    <p>mEq</p> Signup and view all the answers

    Which of the following ions is NOT a cation?

    <p>Cl-</p> Signup and view all the answers

    What is the importance of the valence of ions in calculating mEq?

    <p>It helps in representing the total number of ionic charges</p> Signup and view all the answers

    Which among the following is an example of an electrolyte used in fluid and electrolyte imbalances?

    <p>NaCl</p> Signup and view all the answers

    What are the internationally employed units for measuring molar concentrations?

    <p>mmol/L or µmol/L</p> Signup and view all the answers

    What form can electrolyte preparations take when used for medical treatments?

    <p>Intravenous infusions</p> Signup and view all the answers

    How many mOsmol does 1 mmol of CaCl2 represent?

    <p>3</p> Signup and view all the answers

    What is the osmolarity of 0.9% Sodium Chloride Solution (NaCl)?

    <p>308 mOsmol/L</p> Signup and view all the answers

    What are the units for osmolarity?

    <p>Milliosmoles of solute per liter of solution</p> Signup and view all the answers

    How many mOsmol/L are in a solution with 10 mg% of Ca++ ions?

    <p>2.5 mOsmol/L</p> Signup and view all the answers

    What is the osmolar concentration formula according to U.S. Pharmacopeia?

    <p>Wt.of substance (g/L) / Mol.Wt (g/mol) * No.of Species * 1000</p> Signup and view all the answers

    How many mOsmol does 1 mmol of sodium citrate (Na3C6H5O7) represent?

    <p>4</p> Signup and view all the answers

    What is the difference between osmolarity and osmolality?

    <p>Osmolarity is per liter of solution, osmolality is per kilogram of solvent</p> Signup and view all the answers

    Calculate the osmolarity of a 5% anhydrous dextrose solution with a molecular weight of 180.

    <p>277.7 mOsmol/L</p> Signup and view all the answers

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