Question

1- The indicator is the solution that is slowly added to the sample during a titration.

True

False

2-At the first equivalence point in this experiment the number of moles of HCl added to the sample and the number of moles of PO ₄^3-originally in the sample are

		Half
		Not equal
		0.1 molar
		Equal

3-At the equivalence point Blank 1 PO ₄^3- remains and there is Blank 2 H ₃ O ⁺ leftover. The number of moles of H ₃ O ⁺ added to the sample is Blank 3 to the number of moles of PO ₄^3- with which you started.

4- After the first equivalence point, further addition of HCl will cause the reaction to form what ion?

		H3PO4
		H2PO4-
		HPO42-
		PO43-

5-The titrant in this experiment, HCl, is a base.

True

False

6-

The sample in this experiment, phosphate, is an acid.

True

False

7-The titrant will be poured into which piece of equipment?

		Dropper bottle
		Conical flask
		Pipette
		Buret 8- Before reaching the first endpoint, the color of the sample solution will be Blank 1 . At the first endpoint the color of the solution will be Blank 2 . 9-Before reaching the second endpoint (but after the first one), the color of the sample solution will be   Blank 1 .   At the second endpoint the color of the solution will be   Blank2 10-After you reach the first endpoint, you must keep the sample solution so that you can also find the second endpoint. True False

Answer 1

1- The indicator is the solution that is slowly added to the sample during a titration.

False

2-At the first equivalence point in this experiment the number of moles of HCl added to the sample and the number of moles of PO ₄^3-originally in the sample are 1. Half

4- After the first equivalence point, further addition of HCl will cause the reaction to form HPO₄^2-

5.The titrant in this experiment, HCl, is a base.   True

The sample in this experiment, phosphate, is an acid. True

7-The titrant will be poured into which piece of equipmen    Burret

10-After you reach the first endpoint, you must keep the sample solution so that you can also find the second endpoint.        True