In flask we add:

• Water sample

• Buffer solution

• EBT Powder

• EDTA

In Water Hardness Experiment: We use graduated cylinder to:

• Measure water sample

• Measure EDTA

• Measure EBT

• Measure Buffer solution

EBT is added using

• Burette

• Spatula

• Graduated Cylinder

• Flask

In Water Hardness Experiment: Burette contain

• EBT

• EDTA

• Water Sample

• Buffer Solution

Water Hardness concentration unit in final calculation should be:

• ppm

• mg/lit

• gmol/lit

• gm/mlit

End point of the experiment when color turns from......to......

• Violet to Pink

• Pink to Blue

• Violet to Blue

• Blue to Violet

Do you like the chemistry Lab?

• Yes

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