A scientist in a lab putting some chemicals into an erlenmeyers flask due to test the hardness of the water - the water is soft and the content becomes blue

Close up shot of a hand putting some chemicals into an erlenmeyers flask to check the hardness of the water-the water is soft

A scientist holding an erlenmeyers flask and puts some chemicals into it to test the water hardness

A man checking the hardness of the water in an erlenmeyers flask-the water is soft due to the blue color

A scientist in a lab putting some chemicals into a test tube due to test the hardness of the water

A scientist putting some chemicals into an Erlenmeyer flask and mixes it...

A young handsome scientist showing the water hardness test tubes, he gestures how the soft water is good and the hard water is not...

A scientist adds some water into an erlenmeyer flask

A scientist in a lab mixing a red content in an erlenmeyers flask looks into camera and smiles

A man performing the water hardness test - the water is soft and good for use

A young handsome scientist puts some chemicals into an erlenmeyers flask with a blue content in it and mixes it

Footage of a scientist working in a lab.,she is taking some food samples and puts them into erlenmeyer flask for further quality check

Female scientist mixing chemicals in erlenmeyer flask