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Tems11 [23]
3 years ago
7

HCN(aq)+SO4-2(aq)HSO4-(aq)+CN-(aq)

Chemistry
1 answer:
Elina [12.6K]3 years ago
8 0
<span>HCN(aq)+SO4-2(aq)HSO4-(aq)+CN-(aq)
</span>
Bronsted-Lowry acid in this equation:<span>
Bronsted lowry acid=HCN(aq)

</span>Bronsted-Lowry Base in this equation:<span>
Bronstes lowry base =SO4-2

</span>Conjugate acid in this equation:
CA=CN-<span>

</span>Conjugate base in this equation
CB=HSO4- <span>

</span>
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Does the energy go from the surrounding to the chemicals or from the chemicals to the surround in an exothermic reaction?
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In general terms, exothermic reactions release energy, so the energy goes from the system to the surroundings.
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What is the atomic number for an element whose mass number is 78,
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Answer:

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Explanation:

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When 136g of glycine are dissolved in of a certain mystery liquid , the freezing point of the solution is lower than the freezin
loris [4]

The given question is incomplete. The complete question is:

When 136 g of glycine are dissolved in 950 g of a certain mystery liquid X, the freezing point of the solution is 8.2C lower than the freezing point of pure X. On the other hand, when 136 g of sodium chloride are dissolved in the same mass of X, the freezing point of the solution is 20.0C lower than the freezing point of pure X. Calculate the van't Hoff factor for sodium chloride in X.

Answer: The vant hoff factor for sodium chloride in X is 1.9

Explanation:

Depression in freezing point is given by:

\Delta T_f=i\times K_f\times m

\Delta T_f=T_f^0-T_f=8.2^0C = Depression in freezing point

K_f = freezing point constant

i = vant hoff factor = 1 ( for non electrolyte)

m= molality =\frac{136g\times 1000}{950g\times 75.07g/mol}=1.9

8.2^0C=1\times K_f\times 1.9

K_f=4.32^0C/m

Now Depression in freezing point for sodium chloride is given by:

\Delta T_f=i\times K_f\times m

\Delta T_f=20.0^0C = Depression in freezing point

K_f = freezing point constant  

m= molality = \frac{136g\times 1000}{950g\times 58.5g/mol}=2.45

20.0^0C=i\times 4.32^0C\times 2.45

i=1.9

Thus vant hoff factor for sodium chloride in X is 1.9

3 0
2 years ago
Oxygen gas generated in the thermal decomposition of potassium chlorate is collected over water. At 24ºC and an atmospheric pres
Yanka [14]

Answer:

its 0.163 g

Explanation:

From the total pressure and the vapour pressure of water we can calculate the partial pressure of O2​

PO 2 =P t −P H 2 O

​= 760 − 22.4

=  737.6 mmHg

From the ideal gas equation we write.

W= RT/PVM = (0.0821Latm/Kmol)(273+24)K(0.974atm)(0.128L)(32.0g/mol/) =0.163g

6 0
2 years ago
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