Chapter 10. Calculations II: Compounding

% w/v

g/100 mL

% v/v

mL/100mL

% w/w

g/100 g

Density is equivalent to what?

specific gravity

specific gravity equals...

m (g)/ v (mL)

Osmolarity 1 Dissociation Particle

Dextrose

Mannitol

Osmolarity 2 Dissociation Particles

Potassium chloride (KCl)

Sodium chloride (NaCl)

Sodium Acetate (NaC2H3O2)

Magnesium sulfate (MgSO4)

Osmolarity 3 Dissociation particles

Calcium chloride (CaCl2)

Osmolarity 4 Dissociation particles

Sodium citrate (Na3C6H5O7)

Osmolarity (mosmol/L)

[wt of substance (g/L)/MW (g/mol)] x # particles x 1000

E Value Formula

(58.5 x i)/(MW of drug x 1.8)

Mols Calculation

g/MW

MMol calculation

mg/MW

Compounds with an mEq valence of 1

- Ammonium chloride (NH4Cl)

- Potassium chloride (KCl)

- Potassium gluconate (KC6H11O7)

- Sodium acetate (NaC2H3O2)

- Sodium bicarb (NaHCO3)

- Sodium chloride (NaCl)

Compounds with an mEq valence of 2

- Calcium carbonate (CaCO3)

- Calcium chloride (CaCl2)

- Ferrous Sulfate (FeSO4)

- Lithium carbonate (Li2CO3)

- Magnesium sulfate (MgSO4)

mEq equation

(mg x valence) / MW

OR

mmol x valence

KCl 10% = ? mEq/mL

20 mEq/ 15 mL

8 mEq Li ion = x mg Lithium caps

300 mg

8 mEq Li ion = ? mL lithium citrate syrup

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