Gels

Agarose gel: practice problems

Work out the agarose mass and the buffer volume. Every answer here is computed by the same tested calculator the rest of the site uses, so a solution can never drift away from the maths.

Problem 1 Agarose gel

Work out the agarose mass and the buffer volume.

  • Gel percentage (%): 1.5
  • Casting volume: 25 mL
Show the answer and the working

Weigh 0.375 g of agarose into 25 mL of buffer.

  1. Weigh-out formula: mass = (% / 100) · V
  2. Substitute: mass = (1.5 / 100) · 25 mL = 0.375 g
  3. Buffer: buffer ≈ V = 25 mL

Open this in the calculator to change the numbers.

Problem 2 Agarose gel

Work out the agarose mass and the buffer volume.

  • Gel percentage (%): 2
  • Casting volume: 250 mL
Show the answer and the working

Weigh 5 g of agarose into 250 mL of buffer.

  1. Weigh-out formula: mass = (% / 100) · V
  2. Substitute: mass = (2 / 100) · 250 mL = 5 g
  3. Buffer: buffer ≈ V = 250 mL

Open this in the calculator to change the numbers.

Problem 3 Agarose gel

Work out the agarose mass and the buffer volume.

  • Gel percentage (%): 3
  • Casting volume: 50 mL
Show the answer and the working

Weigh 1.5 g of agarose into 50 mL of buffer.

  1. Weigh-out formula: mass = (% / 100) · V
  2. Substitute: mass = (3 / 100) · 50 mL = 1.5 g
  3. Buffer: buffer ≈ V = 50 mL

Open this in the calculator to change the numbers.

Problem 4 Agarose gel

Work out the agarose mass and the buffer volume.

  • Gel percentage (%): 1.5
  • Casting volume: 100 mL
Show the answer and the working

Weigh 1.5 g of agarose into 100 mL of buffer.

  1. Weigh-out formula: mass = (% / 100) · V
  2. Substitute: mass = (1.5 / 100) · 100 mL = 1.5 g
  3. Buffer: buffer ≈ V = 100 mL

Open this in the calculator to change the numbers.

Problem 5 Agarose gel

Work out the agarose mass and the buffer volume.

  • Gel percentage (%): 4
  • Casting volume: 50 mL
Show the answer and the working

Weigh 2 g of agarose into 50 mL of buffer.

  1. Weigh-out formula: mass = (% / 100) · V
  2. Substitute: mass = (4 / 100) · 50 mL = 2 g
  3. Buffer: buffer ≈ V = 50 mL

Open this in the calculator to change the numbers.

Problem 6 Agarose gel

Work out the agarose mass and the buffer volume.

  • Gel percentage (%): 5
  • Casting volume: 300 mL
Show the answer and the working

Weigh 15 g of agarose into 300 mL of buffer.

  1. Weigh-out formula: mass = (% / 100) · V
  2. Substitute: mass = (5 / 100) · 300 mL = 15 g
  3. Buffer: buffer ≈ V = 300 mL

Open this in the calculator to change the numbers.

Problem 7 Agarose gel

Work out the agarose mass and the buffer volume.

  • Gel percentage (%): 1
  • Casting volume: 30 mL
Show the answer and the working

Weigh 0.3 g of agarose into 30 mL of buffer.

  1. Weigh-out formula: mass = (% / 100) · V
  2. Substitute: mass = (1 / 100) · 30 mL = 0.3 g
  3. Buffer: buffer ≈ V = 30 mL

Open this in the calculator to change the numbers.

Problem 8 Agarose gel

Work out the agarose mass and the buffer volume.

  • Gel percentage (%): 4
  • Casting volume: 100 mL
Show the answer and the working

Weigh 4 g of agarose into 100 mL of buffer.

  1. Weigh-out formula: mass = (% / 100) · V
  2. Substitute: mass = (4 / 100) · 100 mL = 4 g
  3. Buffer: buffer ≈ V = 100 mL

Open this in the calculator to change the numbers.

Problem 9 Agarose gel

Work out the agarose mass and the buffer volume.

  • Gel percentage (%): 3
  • Casting volume: 100 mL
Show the answer and the working

Weigh 3 g of agarose into 100 mL of buffer.

  1. Weigh-out formula: mass = (% / 100) · V
  2. Substitute: mass = (3 / 100) · 100 mL = 3 g
  3. Buffer: buffer ≈ V = 100 mL

Open this in the calculator to change the numbers.

Problem 10 Agarose gel

Work out the agarose mass and the buffer volume.

  • Gel percentage (%): 1
  • Casting volume: 50 mL
Show the answer and the working

Weigh 0.5 g of agarose into 50 mL of buffer.

  1. Weigh-out formula: mass = (% / 100) · V
  2. Substitute: mass = (1 / 100) · 50 mL = 0.5 g
  3. Buffer: buffer ≈ V = 50 mL

Open this in the calculator to change the numbers.

More gels practice

Same topic, different calculation

SDS-PAGE gel

Resolving & stacking gel recipes by acrylamide %.

Stuck on one of them?

Open it in the calculator and it shows the same working step by step, with the units checked and the hazards flagged. Free, no account, and it keeps working offline once the page has loaded.

Open the Agarose gel calculator