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3 years ago

Which equations represent precipitation reactions?

Chemistry

2 answers:

Amanda [17]3 years ago

7 0

Answer : The correct option is, $AgNO_3+NaCl\rightarrow AgCl+NaNO_3$

Explanation :

Precipitation reaction : It is defied as the chemical reaction in which the two soluble salts solutions combined to form an insoluble salts.

(1) $Na_2S+FeBr_2\rightarrow 2NaBr+FeS$

(2) $MgSO_4+CaCl_2\rightarrow MgCl_2+CaSO_4$

(3) $LiOH+NH_4I\rightarrow LiI+NH_4OH$

(4) $2NaCl+K_2S\rightarrow Na_2S+2KCl$

(5) $AgNO_3+NaCl\rightarrow AgCl+NaNO_3$

In the given reactions 1, 2, 3 and 4, the salt forms are completely soluble in water.

As we know that all the sodium, potassium and ammonium salts are soluble in water.

While in the reaction 5, the salt form that is silver chloride (AgCl) are insoluble in water. So, this reaction is a precipitation reaction.

Hence, the correct option is, $AgNO_3+NaCl\rightarrow AgCl+NaNO_3$

pychu [463]3 years ago

6 0

A. : In this reaction one of the product, FeS is insoluble. Therefore, this is a precipitation reaction.

B. : In this reaction, the product is a solid(insoluble). So, this is a precipitation reaction too.

C.: In this reaction, both the products are soluble. So this is not a precipitation reaction.

D.: In this reaction, both the products are soluble. So this is not a precipitation reaction.

E. : In this reaction, the product AgCl is a precipitate. So, it is a precipitation reaction.

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Naturally occurring zirconium exists are five isotopes. axe with a mass of 89.905 u(51.45%); Zr with a mass of 90.906 u (11.22%)

Anton [14]

Isotope 1: 89.905 * 51.45 = 4625.61225 / 100 = 46.2561225
Isotope 2: 90.906 * 11.22 = 1019.96532 / 100 = 10.1996532
Isotope 3: 91.905 * 17.15 = 1576.17175 / 100 = 15.7617075
Isotope 4: 93.906 * 17.38 = 1632.08628 / 100 = 16.3208628
Isotope 5: 95.908 * 2.08 = 268.5424 / 100 = 2.685424

46.2561225 + 10.1996532 + 15.7617075 + 16.3208628 + 2.685424 = 91.22377
actual mass Zr = about 91.22

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3 years ago

The combination of oxygen with other substances to produce new chemical products is called

Flauer [41]

Answer:

The combination of oxygen with other substances to produce new chemical products is called Oxidation.

Explanation:

Oxidation reactions are defined as,

In terms of Inorganic chemistry:

(i) Removal of Electrons:

Example: Mg → Mg²⁺ + 2 e⁻

(ii) Addition of Oxygen:

Example: 2 Mg + O₂ → 2 MgO

In terms of Organic chemistry:

(i) Addition of Electrons:

Example: Cl₂ + 2 e⁻ → 2 Cl⁻

(ii) Addition of Hydrogen:

Example: H₂CCH₂ + H₂ → H₃CCH₃

4 0

3 years ago

When the equation Sn + HNO₃ → SnO₂ + NO₂ + H₂O is balanced in acidic solution, what is the smallest whole-number coefficient for

balu736 [363]

Answer:

Explanation:

Hello,

In this case, for the given reaction we first assign the oxidation state for each species:

$Sn^0 + H^+N^{5+}O^{-2}_3 \rightarrow Sn^{4+}O_2 + N^{4+}O^{2-}_2 + H^+_2O^-$

Whereas the half reactions are:

$Sn^0+2H_2O \rightarrow Sn^{4+}O_2 +4H^++4e^-\\\\H^++H^+N^{5+}O^{-2}_3 +1e^-\rightarrow N^{4+}O^{2-}_2+H_2O$

Next, we exchange the transferred electrons:

$1\times(Sn^0+2H_2O \rightarrow Sn^{4+}O_2 +4H^++4e^-)\\\\4\times (H^++H^+N^{5+}O^{-2}_3 +1e^-\rightarrow N^{4+}O^{2-}_2+H_2O)\\\\\\Sn^0+2H_2O \rightarrow Sn^{4+}O_2 +4H^++4e^-\\\\4H^++4H^+N^{5+}O^{-2}_3 +4e^-\rightarrow 4N^{4+}O^{2-}_2+4H_2O$

Afterwards, we add them to obtain:

$Sn^0+2H_2O+4H^++4H^+N^{5+}O^{-2}_3 \rightarrow Sn^{4+}O_2 +4H^++4N^{4+}O^{2-}_2+4H_2O$

By adding and subtracting common terms we obtain:

$Sn^0+4H^+N^{5+}O^{-2}_3 \rightarrow Sn^{4+}O_2 +4N^{4+}O^{2-}_2+2H_2O$

Finally, by removing the oxidation states we have:

$Sn + 4HNO_3 \rightarrow SnO_2 + 4NO_2 + 2H_2O$

Therefore, the smallest whole-number coefficient for Sn is 1.

Regards.

6 0

3 years ago

I’ll give the brainliest

Readme [11.4K]

Answer:

Water gradually degrades them until the metal parts rust and the other materials deteriorate.

Explanation:

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3 years ago

How many of these transition metals have you heard of before?

AleksAgata [21]

Answer:

38 elements or Element 31: Gallium Element 32: Germanium Element 33: Arsenic Element 34: Selenium Element 35: Bromine Element .

Explanation:

How many transition metals are there?

The 38 elements in groups 3 through 12 of the periodic table are called "transition metals". As with all metals, the transition elements are both ductile and malleable, and conduct electricity and heat.

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2 years ago