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Chemistry Exam - SEC 3

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Questions and Answers

Which of the solution has pH above 7?

0.3M KCN (correct)

1.2M CH3COOH

0.2M HCN

1.5 M NH4Cl

Which of the following shows the type of NaH2PO4 solution and it is PH?

Acidic, PH is below 7 (correct)

Neutral, PH equals 7

Basic, PH is above 7

Basic, PH is below 7

On mixing two equal volumes of nitric acid and potassium hydroxide solution, both of 0.25 M, a solution is formed which is ----------

Acidic

Amphoteric

Alkaline

Neutral (correct)

NH4NO2 solution is acidic inspite of being produced from neutralization of a weak acid with a weak base, as.....

Ka > Kb Signup and view all the answers

Which of the following equally concentrated solution has the lowest pH?

NaCN (aq) Signup and view all the answers

The solubility degree of CuS salt in water is estimated in the unit ----------

mol/L Signup and view all the answers

The solubility degree of copper (II) iodate Cu(IO3)2 is 3.3 X 10-3 M at a certain temperature. What is Ksp at the same temperature?

1.1x10-5 Signup and view all the answers

Which of the following salts from a basic solution?

NaNO2 Signup and view all the answers

If the solubility degree of aluminum hydroxide AL(OH)3 in water equals 1x10-6 mol/L, calculate the solubility product.

2.7 x 10^-24 Signup and view all the answers

Study Notes

Chemistry Exam - SEC 3

Question 1: 0.3M KCN has a pH above 7
Question 2: NaH2PO4 solution is acidic (pH below 7).
Question 3: Mixing equal volumes of 0.25M nitric acid and potassium hydroxide solutions produces an amphoteric solution
Question 4: NH4NO2 solution is acidic despite being produced from the neutralization of a weak acid and weak base because Ka < Kb .
Question 5: NaCN (aq) has the lowest pH among the given equally concentrated solutions.

Solubility and Other Concepts

Question 6: Solubility degree of a CuS salt is measured in mol/L.
Question 7: Given the solubility of copper (II) iodate (Cu(IO3)2) as 3.3 x 10⁻³ M, the Ksp is 1.1 x 10⁻⁵
Question 8: NaNO₂ is a basic solution.
Question 9: The solubility of Aluminum hydroxide (Al(OH)₃) is 1 x 10⁻⁶ mol/L. The solubility product (Ksp) needs to be calculated using this information. (Note: The calculation is not provided in the given text).

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Description

Test your understanding of acids, bases, and solubility concepts with our chemistry quiz for SEC 3 students. Covering various topics, including pH values and ion concentrations, this quiz will challenge your knowledge and problem-solving skills. Prepare to reinforce your learning with practical questions related to chemical solutions.