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Gelneren [198K]
3 years ago
15

What happens when HCl gas is passed through a saturated PbCl2 solution?

Chemistry
1 answer:
VikaD [51]3 years ago
3 0
When HCl is added to a saturated solution of PbCl2, the solubility of PbCl2 would decrease so precipitation would occur. The decrease in the solubility is due to the common ion effect or the presence of Cl- ions in both compounds.
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Answer:

6. 7870 kg/m³ (3 s.f.)

7. 33.4 g (3 s.f.)

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Explanation:

6. The SI unit for density is kg/m³. Thus convert the mass to Kg and volume to m³ first.

1 kg= 1000g

1m³= 1 ×10⁶ cm³

Mass of iron bar

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= 8.16 ÷ 10⁶

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\boxed{density =  \frac{mass}{volume} }

Density of iron bar

=  \frac{0.0642}{8.16 \times 10^{ - 6} }

= 7870 kg/m³ (3 s.f.)

7.

\boxed{mass = density \:  \times volume}

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= 33.408 g

= 33.4 g (3 s.f.)

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= 151 g

= 151 ÷ 1000 kg

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Density of brick

= mass ÷ volume

=  \frac{0.151} {1.25 \times 10^{ - 5} }  \\  = 12600 \: kg/ {m}^{3}

(3 s.f.)

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