NEET Exam  >  NEET Questions  >  What is the concentration of OH- in final sol... Start Learning for Free
What is the concentration of OH- in final solution prepared by mixing 20ml of 0.05molar HCL and 30 ml of 0.1 molar BaOH2.please give the answer in details.?
Verified Answer
What is the concentration of OH- in final solution prepared by mixing ...
The balanced chemical equation for reaction of Ba(OH)2 and HCl is as follows:
 Ba(OH)2 + 2HCl → BaCl2 + 2H2O
1 mole Ba(OH)2 produce 2 moles OH- ions.
Number of moles of OH- ion in solution = concentration of Ba(OH)2 x volume of Ba(OH)2 x 2
                                                             = 0.1 mol L^-1 x 0.03 L x 2
                                                             = 0.006 mol

Number of moles of H+ ion in solution = Concentration of HCl x volume of HCl
                                                          = 0.05 mol L^-1 x 0.02 L
                                                          = 0.001 mol

Now after mixing 0.001 mol H+ will reacts with 0.001 mol OH-.
Number of moles of OH- left unreacted = 0.006 - 0.001
                                                            = 0.005 mol
Total volume of solution = 20 ml + 30 ml = 50 ml = 0.05 L
Concentration of OH- ion in final solution = 0.005 mol / 0.05 L = 0.1 mol L^-1.
This question is part of UPSC exam. View all NEET courses
Most Upvoted Answer
What is the concentration of OH- in final solution prepared by mixing ...
The problem states that we need to determine the concentration of OH- in the final solution prepared by mixing 20 ml of 0.05 molar HCl and 30 ml of 0.1 molar Ba(OH)2. To solve this problem, we will follow these steps:

1. Write down the balanced chemical equation for the reaction between HCl and Ba(OH)2. The balanced equation is as follows:
HCl + Ba(OH)2 → BaCl2 + 2H2O

2. Identify the stoichiometry of the reaction. From the balanced equation, we can see that 1 mole of HCl reacts with 1 mole of Ba(OH)2 to produce 1 mole of BaCl2 and 2 moles of water.

3. Calculate the number of moles of HCl and Ba(OH)2 used in the reaction.
Moles of HCl = volume (in L) × molarity = 0.02 L × 0.05 mol/L = 0.001 mol
Moles of Ba(OH)2 = volume (in L) × molarity = 0.03 L × 0.1 mol/L = 0.003 mol

4. Determine the limiting reagent. The limiting reagent is the reactant that is completely consumed in the reaction and determines the maximum amount of product that can be formed. In this case, HCl and Ba(OH)2 have a 1:1 stoichiometry, so the limiting reagent is the one that is present in the smallest amount. Since HCl has fewer moles (0.001 mol) compared to Ba(OH)2 (0.003 mol), HCl is the limiting reagent.

5. Calculate the moles of OH- ions produced from the reaction. Since HCl is the limiting reagent, it will react completely with Ba(OH)2. From the balanced equation, we can see that 1 mole of Ba(OH)2 produces 2 moles of OH- ions. Therefore, the moles of OH- ions produced will be twice the moles of Ba(OH)2 used in the reaction.
Moles of OH- ions = 2 × moles of Ba(OH)2 = 2 × 0.003 mol = 0.006 mol

6. Calculate the concentration of OH- ions in the final solution. We need to determine the final volume of the solution by adding the volumes of HCl and Ba(OH)2 used.
Final volume = 20 ml + 30 ml = 50 ml = 0.05 L

Concentration of OH- ions = moles of OH- ions / final volume
Concentration of OH- ions = 0.006 mol / 0.05 L = 0.12 mol/L

Therefore, the concentration of OH- ions in the final solution prepared by mixing 20 ml of 0.05 molar HCl and 30 ml of 0.1 molar Ba(OH)2 is 0.12 mol/L.
Attention NEET Students!
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.
Explore Courses for NEET exam

Similar NEET Doubts

Top Courses for NEET

What is the concentration of OH- in final solution prepared by mixing 20ml of 0.05molar HCL and 30 ml of 0.1 molar BaOH2.please give the answer in details.?
Question Description
What is the concentration of OH- in final solution prepared by mixing 20ml of 0.05molar HCL and 30 ml of 0.1 molar BaOH2.please give the answer in details.? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about What is the concentration of OH- in final solution prepared by mixing 20ml of 0.05molar HCL and 30 ml of 0.1 molar BaOH2.please give the answer in details.? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What is the concentration of OH- in final solution prepared by mixing 20ml of 0.05molar HCL and 30 ml of 0.1 molar BaOH2.please give the answer in details.?.
Solutions for What is the concentration of OH- in final solution prepared by mixing 20ml of 0.05molar HCL and 30 ml of 0.1 molar BaOH2.please give the answer in details.? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
Here you can find the meaning of What is the concentration of OH- in final solution prepared by mixing 20ml of 0.05molar HCL and 30 ml of 0.1 molar BaOH2.please give the answer in details.? defined & explained in the simplest way possible. Besides giving the explanation of What is the concentration of OH- in final solution prepared by mixing 20ml of 0.05molar HCL and 30 ml of 0.1 molar BaOH2.please give the answer in details.?, a detailed solution for What is the concentration of OH- in final solution prepared by mixing 20ml of 0.05molar HCL and 30 ml of 0.1 molar BaOH2.please give the answer in details.? has been provided alongside types of What is the concentration of OH- in final solution prepared by mixing 20ml of 0.05molar HCL and 30 ml of 0.1 molar BaOH2.please give the answer in details.? theory, EduRev gives you an ample number of questions to practice What is the concentration of OH- in final solution prepared by mixing 20ml of 0.05molar HCL and 30 ml of 0.1 molar BaOH2.please give the answer in details.? tests, examples and also practice NEET tests.
Explore Courses for NEET exam

Top Courses for NEET

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev