Somebody puts some chemicals into an Erlenmeyer flask to check the water hardness
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
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 scientist mixes chemicals in an erlenmeyer flask
A scientist adds some water into an erlenmeyer flask
A scientist is not satisfied with the water hardness test-the water is hard...
A scientist in a laboratory taking some food samples and puts them into an Erlenmeyer flask for further tests
A scientist in a laboratory taking some food examples and puts them into an Erlenmeyer flask for further tests
A man checking the hardness of the water in an erlenmeyers flask-the water is soft due to the blue color
A scientist holding two test tubes, the result of water hardness test, one good and one bad result
Female scientist mixing chemicals in erlenmeyer flask