Chemistry quiz

Сентябрь 9, 2022

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Chemistry quiz

Содержание

2. A 0.742-gram sample of KHP, KC6H4(COO)(COOH), reacts with 35.0 mL of Ba(OH)2 solution. What is the
3. Calculate the normality of a solution that contains 4.5 g of (COOH)2 in 3000. mL of
4. A solution of H2SO4 contains 9.11 mg of H2SO4 per mL. What is the normality of
5. How many equivalent weights of phosphoric acid are contained in 500. mL of 2.00 M phosphoric
6. What mass of NaOH would be required to neutralize the acid in 75.0 mL of 0.880
7. If 20.8 mL of Ba(OH)2solution reacts with 0.306 g of KHP, KC6H4(COO)(COOH), what is the normality
8. What is the oxidation number of phosphorus in KH2PO4? +1 +2 +3 +4 +5
9. What is the oxidation number of P in the H2PO4-ion? -3 +2 +3 +4 +5
10. 20 22 26 29 32
11. 27 29 31 33 35
12. 20 22 24 26 28
13. 52.3% 56.6% 60.8% 64.5% 69.2%
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Слайд 2

A 0.742-gram sample of KHP, KC6H4(COO)(COOH), reacts with 35.0 mL of

Ba(OH)2 solution. What is the molarity of the Ba(OH)2 solution?

0.127 M
0.0636 M
0.0520 M
0.208 M
0.104 M

Слайд 3

Calculate the normality of a solution that contains 4.5 g of

(COOH)2 in 3000. mL of solution. (Assume the (COOH)2 is to be completely neutralized.)

0.033 N
0.045 N
0.066 N
0.090 N
0.12 N

Слайд 4

A solution of H2SO4 contains 9.11 mg of H2SO4 per mL.

What is the normality of the solution? (Assume the H2SO4 is to be completely neutralized by a base.)

0.0482 N
0.684 N
0.186 N
0.372 N
0.0930 N

Слайд 5

How many equivalent weights of phosphoric acid are contained in 500.

mL of 2.00 M phosphoric acid? (Assume the acid is to be completely neutralized by a base.)

1.00 eq
2.00 eq
3.00 eq
4.00 eq
6.00 eq

Слайд 6

What mass of NaOH would be required to neutralize the acid

in 75.0 mL of 0.880 N HCl?

2.64 g
5.28 g
2.6 kg
3.83 g
6.60 g

Слайд 7

If 20.8 mL of Ba(OH)2solution reacts with 0.306 g of KHP,

KC6H4(COO)(COOH), what is the normality of the Ba(OH)2 solution?

0.0361 N
0.144 N
0.300 N
0.175 N
0.0721 N

Слайд 8

What is the oxidation number of phosphorus in KH2PO4?
+1
+2
+3
+4
+5

Слайд 9

What is the oxidation number of P in the H2PO4-ion?
-3
+2
+3
+4
+5

Слайд 10

20
22
26
29
32

Слайд 11

27
29
31
33
35

Слайд 12

20
22
24
26
28

Слайд 13

52.3%
56.6%
60.8%
64.5%
69.2%