A) The Eriochrome Black T indicator is mistakenly omitted. what is the color of the analyte (standard Ca^2+ solution)?

Describe the appearance of the analyte with the continued addition of the Na^2H^2Y solution? Explain?

B) The Dispensing of the Na^2H^2Y solution from the buret is discountinued when the solution turns purple. Because of this technique error, will the reported molar concentration of the Na^2H^2Y solution be too high, too low, or unaffected?

C) The Dispensing of the Na^2H^2Y solution from the buret is discountinued when the solution turns purple. Because of this technique error, will the reported hardness of the water sample be too high, too low, or unaffected?