The molecular weight of Sodium dodecyl sulfate (SDS) [C_{12}H_{25}NaSO_{4}] is 288.38176928.

Sodium dodecyl sulfate (SDS) (C_{12}H_{25}NaSO_{4}) is an organic compound of five elements: Carbon, Hydrogen, Sodium, Oxygen, and Sulfur. The molecular weight of Sodium dodecyl sulfate (SDS) is 288.38176928 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

**CALCULATION PROCEDURE: Sodium dodecyl sulfate (SDS) [C**_{12}H_{25}NaSO_{4}] Molecular Weight Calculation

_{12}H

_{25}NaSO

_{4}] Molecular Weight Calculation

**Step 1: Find the chemical formula and determine constituent atoms and their number in a Sodium dodecyl sulfate (SDS) molecule.**You will know different atoms and their number in a Sodium dodecyl sulfate (SDS) molecule from the chemical formula. The chemical formula of Sodium dodecyl sulfate (SDS) is C

_{12}H

_{25}NaSO

_{4}. From the chemical formula, you can find that one molecule of Sodium dodecyl sulfate (SDS) consists of twelve Carbon (C) atoms, twenty-five Hydrogen (H) atoms, one Sodium (Na) atom, one Sulfur (S) atom, and four Oxygen atoms.

**Step 2: Find out the atomic weights of each atom (from the periodic table). **

Atomic weight of Carbon (C): 12.0107 (Ref: Jlab-ele006)

Atomic weight of Hydrogen (H): 1.008 (Ref: Lanl-1)

Atomic weight of Sodium (Na): 22.98976928 (Ref: Ciaaw-sodium)

Atomic weight of Oxygen (O): 15.9994 (Ref: Jlab-ele008)

Atomic weight of Sulfur (S): 32.066 (Ref: Jlab-ele016)

**Step 3: Calculate the total weight of each atom in a Sodium dodecyl sulfate (SDS) molecule by multiplying its atomic weight by its number.**

Number of Carbon atoms in Sodium dodecyl sulfate (SDS): 12

Atomic weight of Carbon (C): 12.0107

Total weight of Carbon atoms in Sodium dodecyl sulfate (SDS): 12.0107 x 12 = 144.1284

Number of Hydrogen atoms in Sodium dodecyl sulfate (SDS): 25

Atomic weight of Hydrogen (H): 1.008

Total weight of Hydrogen atoms in Sodium dodecyl sulfate (SDS): 1.008 x 25 = 25.2

Number of Sodium atoms in Sodium dodecyl sulfate (SDS): 1

Atomic weight of Sodium (Na): 22.98976928

Total weight of Sodium atoms in Sodium dodecyl sulfate (SDS): 22.98976928 x 1 = 22.98976928

Number of Sulfur atoms in Sodium dodecyl sulfate (SDS): 1

Atomic weight of Sulfur (S): 32.066

Total weight of Sulfur atoms in Sodium dodecyl sulfate (SDS): 32.066 x 1 = 32.066

Number of Oxygen atoms in Sodium dodecyl sulfate (SDS): 4

Atomic weight of Oxygen (O): 15.9994

Total weight of Oxygen atoms in Sodium dodecyl sulfate (SDS): 15.9994 x 4 = 63.9976

**Step 4: Calculate the molecular weight of Sodium dodecyl sulfate (SDS) by adding up the total weight of all atoms.**

Molecular weight of Sodium dodecyl sulfate (SDS): 144.1284 (Carbon) + 25.2 (Hydrogen) + 22.98976928 (Sodium) + 63.9976 (Oxygen) + 32.066 (Sulfur) = 288.38176928

So the molecular weight of Sodium dodecyl sulfate (SDS) is 288.38176928.

Sodium dodecyl sulfate (SDS) [C_{12}H_{25}NaSO_{4}] Molecular Weight Calculation

Molecular weight of Sodium dodecyl sulfate (SDS) [C_{12}H_{25}NaSO_{4}] | |||

Constituent atoms | Number of each atom | Atomic weight | Total weight |

Carbon (C) | 8 | 12.0107 | 144.1284 |

Hydrogen (H) | 18 | 1.008 | 25.2 |

Sodium (Na) | 1 | 22.98976928 | 22.98976928 |

Oxygen (O) | 4 | 15.9994 | 63.9976 |

Sulfur (S) | 1 | 32.066 | 32.066 |

Molecular weight of Sodium dodecyl sulfate (SDS) [C_{12}H_{25}NaSO_{4}]: | 288.38176928 |

## REFERENCES:

- Lanl-1: https://periodic.lanl.gov/1.shtml
- Jlab-ele006: https://education.jlab.org/itselemental/ele006.html
- Jlab-ele008: https://education.jlab.org/itselemental/ele008.html
- Jlab-ele016: https://education.jlab.org/itselemental/ele016.html
- Ciaaw-sodium: https://www.ciaaw.org/sodium.htm

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