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You are measuring the calcium concentration of a well to determine how hard the water is....

  1. You are measuring the calcium concentration of a well to determine how hard the water is. Which of the following measurement methods should you use to get the concentration of the calcium in the water using a calcium ion selective electrode
    1. A standard additions curve
    2. A calibration curve
    3. Neither
    4. Both
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Answer #1

Determination of concentration of Calcium using calcium ISE ( ion selective Electrode ) is done through standard analysis between Electrode potential and log[conccentration] .
so a. A standard addition curve is correct answer choice .

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