Solution of the variant 05 KR №1 - chemisty Shimanovich
Content: Вариант 05.RAR (122.81 KB)
Uploaded: 01.06.2016
Positive responses: 0
Negative responses: 0
Sold: 0
Refunds: 0
Seller: Михаил_Перович
information about the seller and its items
Loyalty discount! If the total amount of your purchases from the seller more than:
| $1 | the discount is | 1% |
| $5 | the discount is | 2% |
| $10 | the discount is | 3% |
| $20 | the discount is | 5% |
| $50 | the discount is | 7% |
| $100 | the discount is | 10% |
| $200 | the discount is | 15% |
$2.53
The solution of the test work No. 1 of option 05 of the collection of chemistry Shimanovich I.E. in .doc format
(designed in Microsoft Word)
Tasks:
5. Oxide of the trivalent element contains 31.58% oxygen. Calculate the equivalent, molar and atomic masses of this element.
25. Which orbitals of the atom are filled with electrons earlier: 4s or 3d; 5s or 4p? Why? Write the electronic formula of the atom of the element with atomic number 21.
45. What is electron affinity? In what units is it expressed? How does the oxidative activity of non-metals change in the period and in the group of the periodic system with an increase in the serial number? Motivate your answer with the structure of the atom of the corresponding element.
65. What covalent bond is called G-bond and what is n-bond? Disassemble
on the example of the structure of the nitrogen molecule.
85. Write the thermochemical equation of the reaction between CO (g) and hydrogen, as a result of which CH4 (g) and H2O (g) are formed. How much heat will be released during this reaction if 67.2 liters of methane were obtained in terms of normal conditions?
105. The entropy decreases or increases during the transitions: a) water into steam; b) graphite to diamond? Why? calculate Sо298 for each transformation. Make a conclusion about the quantitative change in entropy during phase and allotropic transformations. Answer: a) 118.78 J / (mol • K); b) -3.25 J / (mol * K).
125. The reaction proceeds according to the equation H2 + 12 = 2H1. The rate constant of this reaction at a certain temperature is 0.16. Initial concentrations of reactants: [H2] = 0.04 mol / l; [l2] = 0.05 mol / l. Calculate the initial reaction rate and its rate when [H2] = 0.03 mol / L.
Answer: 3.2 x 10-4; 1.92 x 10-4.
145. Calculate the molar, equivalent and molal concentration of a 16% solution of aluminum chloride with a density of 1.149 g / cm3
Answer: 1.38 M; 4.14 n .; 1.43 m.
165. Calculate the percentage concentration of an aqueous solution of glycerol C3H5 (OH) 3, knowing that this solution boils at 100.39 ° C. Ebullioscopic water constant 0.52 °.
185. Make molecular and ion-molecular equations of the reaction of interaction in solutions between:
a) KHCO3 and H2SO4;
b) Zn (OH) 2 and NaOH;
c) CaCl2 and AgNO3.
205. The following substances were added to the Na2CO3 solution:
a) HCl;
b) NaOH;
c) (NO3) 2;
d) K2S.
In what cases will hydrolysis of sodium carbonate intensify? Why? Write down the ion-molecular equations of hydrolysis of the corresponding salts
(designed in Microsoft Word)
Tasks:
5. Oxide of the trivalent element contains 31.58% oxygen. Calculate the equivalent, molar and atomic masses of this element.
25. Which orbitals of the atom are filled with electrons earlier: 4s or 3d; 5s or 4p? Why? Write the electronic formula of the atom of the element with atomic number 21.
45. What is electron affinity? In what units is it expressed? How does the oxidative activity of non-metals change in the period and in the group of the periodic system with an increase in the serial number? Motivate your answer with the structure of the atom of the corresponding element.
65. What covalent bond is called G-bond and what is n-bond? Disassemble
on the example of the structure of the nitrogen molecule.
85. Write the thermochemical equation of the reaction between CO (g) and hydrogen, as a result of which CH4 (g) and H2O (g) are formed. How much heat will be released during this reaction if 67.2 liters of methane were obtained in terms of normal conditions?
105. The entropy decreases or increases during the transitions: a) water into steam; b) graphite to diamond? Why? calculate Sо298 for each transformation. Make a conclusion about the quantitative change in entropy during phase and allotropic transformations. Answer: a) 118.78 J / (mol • K); b) -3.25 J / (mol * K).
125. The reaction proceeds according to the equation H2 + 12 = 2H1. The rate constant of this reaction at a certain temperature is 0.16. Initial concentrations of reactants: [H2] = 0.04 mol / l; [l2] = 0.05 mol / l. Calculate the initial reaction rate and its rate when [H2] = 0.03 mol / L.
Answer: 3.2 x 10-4; 1.92 x 10-4.
145. Calculate the molar, equivalent and molal concentration of a 16% solution of aluminum chloride with a density of 1.149 g / cm3
Answer: 1.38 M; 4.14 n .; 1.43 m.
165. Calculate the percentage concentration of an aqueous solution of glycerol C3H5 (OH) 3, knowing that this solution boils at 100.39 ° C. Ebullioscopic water constant 0.52 °.
185. Make molecular and ion-molecular equations of the reaction of interaction in solutions between:
a) KHCO3 and H2SO4;
b) Zn (OH) 2 and NaOH;
c) CaCl2 and AgNO3.
205. The following substances were added to the Na2CO3 solution:
a) HCl;
b) NaOH;
c) (NO3) 2;
d) K2S.
In what cases will hydrolysis of sodium carbonate intensify? Why? Write down the ion-molecular equations of hydrolysis of the corresponding salts
No feedback yet