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Yakvenalex [24]

2 years ago

12

Describe what happened when Ag+ combined with Na2CO3. What does this indicate?

2 answers:

Doss [256]2 years ago

7 0

Answer is: yellow precipitate (Ag₂CO₃) will form. It indicate chemical (displacement) reaction happened.

Balanced chemical reaction:

2Ag⁺(aq) + Na₂CO₃(aq) → Ag₂CO₃(s) + Na⁺(aq).

Single Displacement is reaction where neutral element metal or nonmetal become an ion as it replaces another ion in a compound.

Ag₂CO₃ is salt, poorly soluble in water.

Freshly prepared silver carbonate is colourless, but the solid quickly turns yellow.

Y_Kistochka [10]2 years ago

4 0

When Ag+ is combined with Na2CO3, the substances formed are Ag2CO3 and Na+. In this case, Ag performs single substitution over the element Na to form another set of substances. There are other types of reactions like double displacement, decomposition, etc.

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Water has a boiling point of 100.0°C and a Kb of 0.512°C/m. What is the boiling

Reil [10]

Answer:

The boiling point of a 8.5 m solution of Mg3(PO4)2 in water is<u> 394.91 K.</u>

Explanation:

The formula for molal boiling Point elevation is :

$\Delta T_{b} = iK_{b}m$

$\Delta T_{b}$ = elevation in boiling Point

$K_{b}$ = Boiling point constant( ebullioscopic constant)

m = molality of the solution

<em>i =</em> Van't Hoff Factor

Van't Hoff Factor = It takes into accounts,The abnormal values of Temperature change due to association and dissociation .

In solution Mg3(PO4)2 dissociates as follow :

$Mg_{3}(PO_{4})_{2}\rightarrow 3Mg^{2+} + 2 PO_{4}^{3-}$

Total ions after dissociation in solution :

= 3 ions of Mg + 2 ions of phosphate

Total ions = 5

<em>i =</em> Van't Hoff Factor = 5

m = 8.5 m

$K_{b}$ = 0.512 °C/m

Insert the values and calculate temperature change:

$\Delta T_{b} = iK_{b}m$

$\Delta T_{b} = 5\times 0.512\times 8.5$

$\Delta T_{b} = 21.76 K$

Boiling point of pure water = 100°C = 273.15 +100 = 373.15 K

$\Delta T_{b} = T_{b} - T_{b}_{pure}$

$T_{b}_{pure}$ = 373.15 K[/tex]

21.76 = T - 373.15

T = 373.15 + 21.76

T =394.91 K

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sertanlavr [38]

Answer:

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Explanation:

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Answer:

.................

Explanation:

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Taya2010 [7]

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