1. Water is the product of reaction between an acid and a ______. 2. A Bronsted

ID: 780825 • Letter: 1

Question

1. Water is the product of reaction between an acid and a ______.

2. A Bronsted acid produces _______ ions in aqueous solutions.

3. Hydroxide (OH-) ions are produced by Bronsted _____ in aqueous solutions.

4. The equivalent weight (ew) of an acid is that weight which will produce in aqueous solutions ______ mol(s) of _____ ions.

5. The ew of a base is that weight which will neutralize_____ ew(s) of an acid.

6. One ew of a base is always neutralized by _____ ew of an acid.

7. The ionization of phosphoric acid (H3PO4) can be described by the following equation: H3PO4 + 3H2O ---> 3H3O+ + PO4 3-

the weight of one mole of H3PO4 is 98.00 g. The ew of this acid is therefore _______ g.

8. A 0.5 N phosphoric acid solution contains ______ g of H3PO4 in one liter of solution.

9. The normality of an acid is defined as N=number of ew of acid/volume of solution in liters (v). Thus N x V = _____.

10. Combining questions 6 and 9, we can state that normality x volume of an acid = ______ x ______ of a base.

11. During a titration, the point at which an acid is exactly neutralized by a base is called the _______.

12. An indicator is used to enable the ________ of a titration to be observed by a color change.

1)base

2)H+

3)base

4)one,H+

5)one

6)one

7)Equivalent mass = 97.9953/3 = 32.7g/eq

8)16.35

9)constant

10)normality *volume

11)equivalence point

12)equivalence point

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