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Quiz

Lesson 3: Quantitative Chemical Analysis – Volumetric and Gravimetric Methods — Picture questions (exam style)

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1.
2.5 g of impure Na₂CO₃ is made up to 250 mL; 20 mL is titrated with 0.05 M HCl (burette shown). Which option is correct?
2.5 g of impure Na₂CO₃ is made up to 250 mL; 20 mL is titrated with 0.05 M HCl (burette shown). Which option is correct?
HCl volume needed = 34 mL, purity = 20%
HCl volume needed = 67.9 mL, purity = 90%
HCl volume needed = 67.9 mL, purity = 81%
HCl volume needed = 84.9 mL, purity = 100%
2.
In the titration shown, 10 mL of NH₃ is titrated with 0.15 M H₂SO₄. Using the burette readings, find the concentration of the base (mol L−1).
In the titration shown, 10 mL of NH₃ is titrated with 0.15 M H₂SO₄. Using the burette readings, find the concentration of the base (mol L⁻¹).
0.291 mol/L
0.0387 mol/L
0.582 mol/L
1.16 mol/L
3.
5.75 g of BaCl₂·xH₂O crystals are heated to constant mass as shown. Find x. (BaCl₂ = 208, H₂O = 18)
5.75 g of BaCl₂·xH₂O crystals are heated to constant mass as shown. Find x. (BaCl₂ = 208, H₂O = 18)
5
10
7
4
4.
The titration curve (pH vs volume added) is shown. Which indicator is suitable?
The titration curve (pH vs volume added) is shown. Which indicator is suitable?
either methyl orange or phenolphthalein
phenolphthalein
no suitable indicator
methyl orange
5.
A 1.4 g sample is dissolved and its Br− precipitated as AgBr; the dried precipitate is 1.75 g (see diagram). Find the % of Br− in the sample.
A 1.4 g sample is dissolved and its Br⁻ precipitated as AgBr; the dried precipitate is 1.75 g (see diagram). Find the % of Br⁻ in the sample.
106 %
53.2 %
42.6 %
125 %
6.
1.75 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
1.75 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
7
1
5
10
7.
The curve shows base being added to acid. What types of acid and base are these?
The curve shows base being added to acid. What types of acid and base are these?
strong acid with weak base
weak acid with strong base
weak acid with weak base
strong acid with strong base
8.
9.75 g of Na₂CO₃·xH₂O crystals are heated to constant mass as shown. Find x. (Na₂CO₃ = 106, H₂O = 18)
9.75 g of Na₂CO₃·xH₂O crystals are heated to constant mass as shown. Find x. (Na₂CO₃ = 106, H₂O = 18)
8
10
1
4
9.
3.5 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
3.5 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
5
10
3
4
10.
0.5 g of AgCl precipitate forms. What mass of Cl− does it contain?
0.5 g of AgCl precipitate forms. What mass of Cl⁻ does it contain?
0.124 g
0.500 g
0.247 g
2.02 g
11.
6.25 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
6.25 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
10
6
4
2
12.
In the titration shown, 25 mL of Ba(OH)₂ is titrated with 0.08 M CH₃COOH. Using the burette readings, find the concentration of the base (g L−1).
In the titration shown, 25 mL of Ba(OH)₂ is titrated with 0.08 M CH₃COOH. Using the burette readings, find the concentration of the base (g L⁻¹).
21.8 g/L
10.9 g/L
0.0109 g/L
3.83 g/L
13.
6.75 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
6.75 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
6
7
1
8
14.
1.75 g of BaCl₂·xH₂O crystals are heated to constant mass as shown. Find x. (BaCl₂ = 208, H₂O = 18)
1.75 g of BaCl₂·xH₂O crystals are heated to constant mass as shown. Find x. (BaCl₂ = 208, H₂O = 18)
7
3
1
8
15.
5.25 g of Na₂CO₃·xH₂O crystals are heated to constant mass as shown. Find x. (Na₂CO₃ = 106, H₂O = 18)
5.25 g of Na₂CO₃·xH₂O crystals are heated to constant mass as shown. Find x. (Na₂CO₃ = 106, H₂O = 18)
4
2
8
1
16.
3.0 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
3.0 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
5
6
8
10
17.
2.75 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
2.75 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
7
3
4
2
18.
2.25 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
2.25 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
5
3
2
10
19.
8.0 g of BaCl₂·xH₂O crystals are heated to constant mass as shown. Find x. (BaCl₂ = 208, H₂O = 18)
8.0 g of BaCl₂·xH₂O crystals are heated to constant mass as shown. Find x. (BaCl₂ = 208, H₂O = 18)
1
5
6
2
20.
7.25 g of FeSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (FeSO₄ = 152, H₂O = 18)
7.25 g of FeSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (FeSO₄ = 152, H₂O = 18)
3
5
10
4
21.
3.0 g of FeSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (FeSO₄ = 152, H₂O = 18)
3.0 g of FeSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (FeSO₄ = 152, H₂O = 18)
4
8
10
2
22.
7.5 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
7.5 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
5
2
10
8
23.
9.25 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
9.25 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
5
6
8
4
24.
2.25 g of FeSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (FeSO₄ = 152, H₂O = 18)
2.25 g of FeSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (FeSO₄ = 152, H₂O = 18)
5
3
2
7
25.
6.25 g of BaCl₂·xH₂O crystals are heated to constant mass as shown. Find x. (BaCl₂ = 208, H₂O = 18)
6.25 g of BaCl₂·xH₂O crystals are heated to constant mass as shown. Find x. (BaCl₂ = 208, H₂O = 18)
6
4
3
5
26.
2.75 g of BaCl₂·xH₂O crystals are heated to constant mass as shown. Find x. (BaCl₂ = 208, H₂O = 18)
2.75 g of BaCl₂·xH₂O crystals are heated to constant mass as shown. Find x. (BaCl₂ = 208, H₂O = 18)
1
8
7
4
27.
8.0 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
8.0 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
2
5
1
7
28.
3.5 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
3.5 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
10
1
4
5
29.
3.5 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
3.5 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
8
5
1
6
30.
7.5 g of Na₂CO₃·xH₂O crystals are heated to constant mass as shown. Find x. (Na₂CO₃ = 106, H₂O = 18)
7.5 g of Na₂CO₃·xH₂O crystals are heated to constant mass as shown. Find x. (Na₂CO₃ = 106, H₂O = 18)
5
2
7
10
31.
8.75 g of BaCl₂·xH₂O crystals are heated to constant mass as shown. Find x. (BaCl₂ = 208, H₂O = 18)
8.75 g of BaCl₂·xH₂O crystals are heated to constant mass as shown. Find x. (BaCl₂ = 208, H₂O = 18)
3
4
6
7
32.
6.5 g of FeSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (FeSO₄ = 152, H₂O = 18)
6.5 g of FeSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (FeSO₄ = 152, H₂O = 18)
5
2
4
10
33.
1.25 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
1.25 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
6
2
1
7
34.
6.25 g of BaCl₂·xH₂O crystals are heated to constant mass as shown. Find x. (BaCl₂ = 208, H₂O = 18)
6.25 g of BaCl₂·xH₂O crystals are heated to constant mass as shown. Find x. (BaCl₂ = 208, H₂O = 18)
6
3
1
5
35.
3.75 g of BaCl₂·xH₂O crystals are heated to constant mass as shown. Find x. (BaCl₂ = 208, H₂O = 18)
3.75 g of BaCl₂·xH₂O crystals are heated to constant mass as shown. Find x. (BaCl₂ = 208, H₂O = 18)
3
10
6
8
36.
5.75 g of Na₂CO₃·xH₂O crystals are heated to constant mass as shown. Find x. (Na₂CO₃ = 106, H₂O = 18)
5.75 g of Na₂CO₃·xH₂O crystals are heated to constant mass as shown. Find x. (Na₂CO₃ = 106, H₂O = 18)
8
4
6
7
37.
4.75 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
4.75 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
3
2
7
8
38.
4.0 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
4.0 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
5
8
2
4
39.
6.0 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
6.0 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
7
6
4
2
40.
4.5 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
4.5 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
7
1
6
5
41.
9.75 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
9.75 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
4
3
1
10
42.
9.75 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
9.75 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
8
4
3
1
43.
2.4 g of Fe₂O₃ precipitate forms. What mass of Fe does it contain?
2.4 g of Fe₂O₃ precipitate forms. What mass of Fe does it contain?
3.36 g
2.40 g
3.43 g
1.68 g
44.
1.0 g of FeSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (FeSO₄ = 152, H₂O = 18)
1.0 g of FeSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (FeSO₄ = 152, H₂O = 18)
4
3
6
7
45.
1.0 g of Na₂CO₃·xH₂O crystals are heated to constant mass as shown. Find x. (Na₂CO₃ = 106, H₂O = 18)
1.0 g of Na₂CO₃·xH₂O crystals are heated to constant mass as shown. Find x. (Na₂CO₃ = 106, H₂O = 18)
6
10
3
4
46.
3.25 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
3.25 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
2
5
7
6
47.
1.25 g of Na₂CO₃·xH₂O crystals are heated to constant mass as shown. Find x. (Na₂CO₃ = 106, H₂O = 18)
1.25 g of Na₂CO₃·xH₂O crystals are heated to constant mass as shown. Find x. (Na₂CO₃ = 106, H₂O = 18)
8
1
6
5
48.
4.5 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
4.5 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
10
3
7
2
49.
5.25 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
5.25 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
1
3
6
2
50.
4.25 g of Na₂CO₃·xH₂O crystals are heated to constant mass as shown. Find x. (Na₂CO₃ = 106, H₂O = 18)
4.25 g of Na₂CO₃·xH₂O crystals are heated to constant mass as shown. Find x. (Na₂CO₃ = 106, H₂O = 18)
4
3
2
10
51.
4.25 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
4.25 g of MgSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (MgSO₄ = 120, H₂O = 18)
6
10
1
4
52.
9.75 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
9.75 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
4
7
8
2
53.
6.5 g of Na₂CO₃·xH₂O crystals are heated to constant mass as shown. Find x. (Na₂CO₃ = 106, H₂O = 18)
6.5 g of Na₂CO₃·xH₂O crystals are heated to constant mass as shown. Find x. (Na₂CO₃ = 106, H₂O = 18)
6
2
5
4
54.
7.75 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
7.75 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
10
3
2
6
55.
7.0 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
7.0 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
6
5
8
4
56.
5.25 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
5.25 g of CuSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CuSO₄ = 159.5, H₂O = 18)
7
6
8
5
57.
3.0 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
3.0 g of CaSO₄·xH₂O crystals are heated to constant mass as shown. Find x. (CaSO₄ = 136, H₂O = 18)
1
7
2
8
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