Sahary:
4-% acid ionization in water is 4. Find the ratio of hydroxide ion concentration to hydronium ion concentration in 0.1 M solution. 2 points
3- If in a galvanic cell, the direction of the movement of electrons from the hydrogen standard electrode to the hypothesized electrode is M, then answer the following questions. 1 mark
A) Compare the reducing power of M metal and H2 gas.
b) Write the reaction of Ande’s cell.
5- Answer the questions according to the shape. 2 points
a) Determine the direction of electron movement in the outer orbit.
b) Write the general reaction of the cell and specify the reducing species.
c) What is the role of the porous wall?
6-
Give short answers to the following questions, 2.5 points
a) In the same conditions, which of the cotton or polyester fabrics has the highest remaining stain percentage?
b) Which metal has the lowest density and E0?
c) Why can’t galvanized iron be used for food packaging, unlike tin?
d) Which electrode plays the role of plating an iron spoon with silver? Which electrode is the same type of electrolyte solution?
e) Why soap does not foam well in hard water?
7- Obtain the oxidation numbers of carbon and nitrogen atoms. 1 point
8- What kind of cleaner does the figure show? 1 point
b) Identify the hydrophilic and hydrophobic part.
c) Does it show its cleaning properties in hard water?
9- In the following reaction, determine the reducing and oxidizing species by calculating the oxidation number change. 1 mark
2Al203+3C gives Al+3CO2
10-Answer the questions according to the conductivity of molten sodium chloride. 1 mark
a) What is the name of the cell used?
b) What element is used to prepare?
c) Write the half reaction done in the anode.
12-
Determine whether the following statements are true or false. 2 points
A) Most of the fruits are acidic and the pH is less than 7.
b) The higher the hydronium ion concentration, the more alkaline the solution.
c) Metals that have more reducing power than H2, their E0 sign is positive.
d) Fats are a mixture of esters and long chain fatty acids
11- Find the pH of the 0.005 M hydrocyanic acid solution, if the ionization percentage is 0.02. 5.1 points
12-
a) What kind of iron sheet does the given figure show? 1/5 marks
b) Does the iron in the sheet rust without scratches? Why?
c) What reaction occurs in the cathode in case of a scratch?
13-
By writing the ionic equations, tell which one will be brighter in the lamp? 1 point
A) One molar hydrocyanic acid
b) One molar hydrochloric acid
This post is written by Hayajan_me