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zlopas [31]
3 years ago
10

When aqueous solutions of ________ are mixed, a precipitate forms.

Chemistry
1 answer:
xeze [42]3 years ago
7 0

Answer:

A) NiBr₂ and AgNO₃  

Explanation:

We can use the solubility rules to decide which reaction gives the precipitate.

The important ones for this problem are:

  1. Salts of Group I elements and of ammonia are soluble.  
  2. Nitrates are  soluble.
  3. Halides are soluble. Important exceptions the silver halides.
  4. Most sulfates are soluble.
  5. Most hydroxides are slightly soluble.

The possible products from each reaction are

A) Ni(NO₃)₂ and AgBr; B) NaBr and KI; C) KCl and Cr₂(SO₄)₃

D) KNO₃ and Ba(OH)₂; E) LiI and Cs₂CO₃.

A) Ni(NO₃)₂ and AgBr

Ni(NO₃)₂ — soluble (Rule 2)

     AgBr — insoluble (an exception to Rule 3)

When aqueous solutions of NiBr₂ and AgNO₃ are mixed, a precipitate forms.

B) NaBr and KI

NaBr — soluble (Rule 1)

    KI — soluble (Rule 1)

C) KCl and Cr₂(SO₄)₃

        KCl — soluble (Rule 1)

Cr₂(SO₄)₃ — soluble (Rule 4)

D) KNO₃ and Ba(OH)₂

   KNO₃ — soluble (Rule 1)

Ba(OH)₂ — soluble (Rule 5)

E) LiI and Cs₂CO₃

       LiI — soluble (Rule 1)

Cs₂CO₃ — soluble (Rule 1)

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They all have the same number of atoms

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O They all have the same number of atomst

a mole of anything contains Avogadros number of 6.022X10^23  things

which has the greatest number of thing? a dozen eggs, a dozen cookies, a dozen pizzas?

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particles.

just like every dozen contains 12

so

They all have the same number of atoms

3 0
3 years ago
A CaCl2 solution is given to increase blood levels of calcium. If a patient receives 6.1 mL of a 12 % (m/v) CaCl2 solution, how
Yuliya22 [10]

Mass of CaCl₂ = 0.732 g

<h3>Further explanation</h3>

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight / volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

\tt \%(m/v)\rightarrow 12\%=\dfrac{mass~CaCl_2}{volume~of~solution}\times 100\%\\\\mass~CaCl_2=12\%\times 6.1\div 100\%\\\\mass~CaCl_2=0.732~g

5 0
3 years ago
Describe, on a molecular level, how you would expect these lipids to behave in water.
Gelneren [198K]
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7 0
3 years ago
A public School district furnishes pencils to its elementary school. The pencils the secretary orders from the district warehous
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Answer:

The minimum number of boxes of pencils to be ordered is 630 boxes.

Explanation:

Since a pupil uses averagely 9.3 pencils

and a box contains 12 pencils,

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__________________________________________

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812 x 9.3 = 7551.6

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Having a total number of 630 boxes of pencils to be ordered.

3 0
2 years ago
In an experiment Teresa's measures 15.5 mL of water she must have used a
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Answer:

transfer pipet that had markings every 0.1 mL.

Explanation:

3 0
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