अम्ल, क्षार एवं लवण |Acid Base and Salt |Science ( Vigyaan ) | Class 10 | Ch 2 | 12 PM |L3| Doubtnut

Acids,Bases and pH - Class 10 Science | 7 PM Master Class By Vipin Sir

Class 10 Science| Chapter 2 Acids, Bases and Salts | Important Questions | Revision | Part-2

Class 10 Science| Chapter 2 Acids, Bases and Salts | Important Questions | Revision | Part-1

Acids(अम्ल)|Base(क्षारक )|Salt(लवण )|Summary

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Class 10 Science (Hindi) | Chapter 2 | अम्ल, क्षार तथा लवण | Important Questions | Quick Revision

The pH of basic buffer mixtures is given by : pH=pK_(a)+log((["Base"])/(["Salt"])) , whereas pH of acidic buffer mixtures is given by: pH= pK_(a)+log((["Salt"])/(["Acid"])) . Addition of little acid or base although shows no appreciable change for all practical purpose, but since the ratio (["Base"])/(["Salt"]) or (["Salt"])/(["Acid"]) change, a slight decrease or increase in pH results in. The volume of 0.2M NaOH needed to prepare a buffer of pH 4.74 with 50 mL of 0.2M acetic acid is: (pK_(a) of CH_(3)COO^(-)= 9.26)

The science lecture theatre of a college is 10 m wide and has a dorr at a cormer. A science techer entres at 12 . 00 noon through the dorr and makes 8 rounds along the 10 m wall back and forth during the period and finaal leaves the class room at 12 . 40 p.m. through the same door. Compute the averae speed and average velocity.