B.tech 1st Year Chemistry Lab Viva Questions And Answers Apr 2026

The reaction between EDTA and metal ions is pH-dependent. A pH of 10 ensures the EBT indicator works correctly and the complex remains stable.

Always state the units (N, M, ppm, or ml) when giving an answer.

EDTA is a complexing agent. It forms stable, soluble complexes with calcium and magnesium ions, allowing for precise measurement. B.tech 1st Year Chemistry Lab Viva Questions And Answers

It measures the change in electrical conductivity of the solution as the titrant is added. The endpoint is where the conductivity reaches a minimum or maximum.

The presence of chlorides and sulfates of calcium and magnesium. The reaction between EDTA and metal ions is pH-dependent

For colorless liquids, read the lower meniscus; for colored liquids, read the upper one.

A solution whose concentration is exactly known. EDTA is a complexing agent

chosen as the standard for hardness? Its molecular weight is exactly 100, which simplifies calculations, and it is the most common insoluble salt in water. ⚡ Instrumental Methods