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Dominik [7]
3 years ago
14

Which reaction leads to the formation of a precipitate?

Chemistry
2 answers:
scoray [572]3 years ago
7 0

Answer: 2Ca(OH)_2(aq)+2FeCl_3(aq)\rightarrow CaCl_2(aq)+2Fe(OH)_2(s)

Explanation: A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

The reactions in which one of the product is formed as a solid are called as precipitation reactions.

a) 2Cr(NO_3)_3(aq)+3FeSO_4(aq)\rightarrow Cr_2(SO_4)_3(aq)+3FeNO_3(aq)

b) 2RbF(aq)+CuSO_4(aq)\rightarrow Rb_2(SO_4)(aq)+CuF_2(aq)

c) 2Ca(OH)_2(aq)+2FeCl_3(aq)\rightarrow CaCl_2(aq)+2Fe(OH)_2(s)

Brrunno [24]3 years ago
6 0

2Ca(OH)2(aq) + 2FeCl3(aq) on the dead locs

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A particle of mass 2.0 kg moves under the influence of the force F(x)=(-5x^2+7x)~\text{N}F(x)=(−5x ​2 ​​ +7x) N. If its speed at
Brums [2.3K]

Answer:

The speed of the particle at x = 4.0 m is 13.66 m/s

Explanation:

The work done by this force between the two points above is given by

W = ∫ F dx

W = ∫⁴₋₄ (-5x² + 7x) dx

W = [(-5x³/3) + (7x²/2)]⁴₋₄

W = [(-5(4³)/3) + (7(4²)/2)] - [(-5(-4)³)/3) + (7((-4)²)/2)] = (-50.6667) - (162.6667) = (- 213.33 J)

Kinetic energy at -4.0 m

At this point, v = 20 m/s

K.E = mv²/2 = 2 × 20²/2 = 400 J

To obtain the kinetic energy at 4 m,

We apply the work-energy theorem which mathematically translates to

The work done in moving a particle from one point to another = Change in kinetic energy of the particle between those two points

W = ΔK.E

Work done between x = - 4m and x = 4 m is - 213.33 J

Hence, ΔK.E = -213.33 J

Change in kinetic energy of the particle between x = - 4m and x = 4m is ΔK.E

ΔK.E = (Kinetic energy at x = 4m) - (kinetic energy at x = - 4m)

- 213.33 J = (mv²/2) - 400

mv²/2 = -213.33 + 400 = 186.67 J

2v² = 2 × 186.67

v² = 186.67

v = 13.66 m/s.

5 0
3 years ago
The process in which organisms grow and replace worn-out cells is called: A. Cell regeneration B. Cell division C. Mitosis D. Bo
djyliett [7]
The mitosis is the cell division so it both B and C
7 0
3 years ago
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pickupchik [31]

Answer:

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Winds always blow from low to high pressure.

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3 0
3 years ago
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Which of these are most likely to occur along a transform boundary?
Murljashka [212]

A earthquakes because the plates will suddenly shift quickly or gring quickly causing the ground to move because of the tectonic plates.

5 0
3 years ago
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A scuba tank contains a mixture of oxygen (O2) and nitrogen (N2) gas. The oxygen has a partial pressure of PO2=5.62MPa. The tota
dmitriy555 [2]

Answer:

21.16 MPa

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Partial pressure of oxygen = 5.62 MPa

Total gas pressure = 26.78 MPa

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This implies that;

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Therefore;

Partial pressure of nitrogen= 26.78 - 5.62

Partial pressure of nitrogen = 21.16 MPa

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3 years ago
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