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Yakvenalex [24]
3 years ago
9

The equation Mg(NO3)2(aq) + 2KOH(aq) --> Mg(OH)2 (s) + 2KNO3 (aq) is an example of which type of reaction? A) decomposition B

) Acid/Base C) Precipitation
Chemistry
1 answer:
damaskus [11]3 years ago
8 0

Answer:

C) Precipitation

Explanation:

Above reaction forms the precipitate of Mg(OH)_2(Magnesium Hydroxide). Hence, it is Precipitation reaction. This reaction is also known as Double displacement reaction.

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<h3>Changes can occur to the physical properties of a substance, but the chemical composition of the substance remains the same.</h3>

Explanation:

A physical change can not change the chemical makeup of a substance. If it did, it would be considered a chemical change. It can, however, be physically changed.

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In the activity, click on the E∘cell and Keq quantities to observe how they are related. Use this relation to calculate Keq for
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Answer:

The standard cell potential of the reaction is 0.78 Volts.

Explanation:

Cu^{2+}(aq)+Fe(s)\rightarrow Cu(s)+Fe^{2+}(aq)

Reduction at cathode :

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Reduction potential of  Cu^{2+} to Cu=E^o_{1}=0.34 V

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To calculate the E^o_{cell} of the reaction, we use the equation:

E^o_{cell}=E^o_{red,cathode}-E^o_{red,anode}

Putting values in above equation, we get:

E^o_{cell}=0.34V -(-0.44 V)=0.78 V

The standard cell potential of the reaction is 0.78 Volts.

3 0
3 years ago
How many miles of N2 are in a flask with a volume of 250.0 mL at a pressure of 300.0 kPa and a temperature of 300.0 K?
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