CBSE Board | Homework Help

Every body in the universe attracts every other body with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

1 Thank You

Barhan Ahmed 4 years, 1 month ago (10383631)

Barhan Ahmed

0 Thank You

ANSWER

Ionic equilibrium

Posted by Nithu Seervi 4 years, 1 month ago (12231550)

CBSE > Class 12 > Chemistry

2 answers

Kunishka Yadav 4 years, 1 month ago (11119073)

Ionic equilibrium is the equilibrium established between the unionized molecules and the ions in a solution of weak electrolytes. pH is a measure of acidity or alkalinity of a solution. Acids produce hydrogen ions in solution. When a sparingly soluble salt is dissolved in water, a dynamic equilibrium is established.

0 Thank You

Jaya Shree 4 years, 1 month ago (12144336)

The equilibrium established between the unionized molecules and the ions in the solution of weak electrolytes is called ionic equilibrium. For example, take acetic acid breaking up into acetate ions and hydrogen ions: CH3 COOH → CH3 COO- + H+ Chemical substances that can conduct electricity in their aqueous state or in molten state are called electrolytes. In pure water or in an aqueous solution, the product of concentrations of hydrogen and hydroxyl ions is a constant at a given temperature. This is called ionic product of water and is conventionally designated by Kw. The idea of the ionic product of water can be understood by looking at the autoionization reaction of water that may be expressed as: H2 O + H2 O = H3 O+ + OH- Kw = CH3 O+ COH- The value of Kw at 25°C is 1*10-14. In the study of acid base equilibria in aqueous solutions, we're primarily interested in the hydrogen ion concentration of a solution. Solutions that we deal with are usually dilute, and the hydrogen ion concentrations are some negative power of 10. pH is a measure of hydrogen ion concentration. It's a measure of the acidity or alkalinity of a solution. Aqueous solutions at 25°C with a pH less than seven are acidic, while those with a pH greater than seven are basic or alkaline. pH can be calculated using the following formula. pH = -log CH3 O+ Let's discuss how to calculate pH with an example. What will be the concentration of CH3 O+ in a solution having pH = 5.6? Solution: pH = -log CH3 O+ log [H3 O+] = -pH log [H3 O+] = -5.6 [H3 O+] = antilog (-5.6) = 2.512*10-6

1 Thank You

ANSWER

कवि ने 'हुआ सबका अपना आकाश' क्या कहा है?

Posted by Khushi Rajput 4 years, 1 month ago (12267578)

CBSE > Class 04 > हिंदी

3 answers

Aanchal Singh 4 years ago (11140878)

I mean upar hai

0 Thank You

Rocky Singh 4 years, 1 month ago (9671327)

uuper hai

0 Thank You

Karan Gaikwad 4 years, 1 month ago (10694186)

0 Thank You

ANSWER

Which is not a use of product identification? A) increase in national income B) state the problem C) brings new product in the market D) increase employment

Posted by Harsha Agrawal 4 years, 1 month ago (9807111)

CBSE > Class 12 > Entrepreneurship

1 answers

Deva Purohit 3 years, 9 months ago (11639443)

National income

1 Thank You

ANSWER

Sinbad the sailor

Posted by Gigily A George 4 years, 1 month ago (11714694)

CBSE > Class 05 > English

0 answers

ANSWER

Which diseases are spread by flies and how?

Posted by Arpita Kumari 4 years, 1 month ago (12230845)

CBSE > Class 05 > EVS - Looking Around

1 answers

Bhavya Pandey Bhavya 4 years, 1 month ago (12286078)

1 Thank You

ANSWER

What is the hiawatha

Posted by Sandeep Kaur 4 years, 1 month ago (12127978)

UP Board > Class 12 > English

1 answers

Sia ? 4 years, 1 month ago (6945213)

Hiawatha, also known as Ayenwathaaa or Aiionwatha, was a precolonial Native American leader and co-founder of the Iroquois Confederacy. He was a leader of the Onondaga people, the Mohawk people, or both. According to some accounts, he was born an Onondaga but adopted into the Mohawks.

1 Thank You

ANSWER

Experiment 1 saraswati

Posted by Veronica Zou 4 years, 1 month ago (12199896)

CBSE > Class 12 > Home Science

0 answers

ANSWER

Assamese students here

Posted by Bh Gu 4 years, 1 month ago (12241846)

CBSE > Class 09 > Regional Language

0 answers

ANSWER

What are the several relation which a young man has to enter in his lifetime

Posted by John John 4 years, 1 month ago (12211748)

CBSE > Class 11 > Information Technology (802)

0 answers

ANSWER

What is the syllabus for term 1 boards exam 2021-2022?

Posted by Adhyan Aggarwal 4 years, 1 month ago (7908822)

CBSE > Class 10 > Information Technology (402)

1 answers

Armyloveraman Kumar 4 years, 1 month ago (12293005)

1 Thank You

ANSWER

MCQ question of lt class 9

Posted by Ayush Kumar 4 years, 1 month ago (12262854)

CBSE > Class 09 > Information Technology (402)

1 answers

Shreyansh Udawant 4 years, 1 month ago (12076285)

Which book are you having

3 Thank You

ANSWER

Punjabi.

Posted by Avi Gill 4 years, 1 month ago (11952758)

CBSE > Class 10 > Regional Language

1 answers

Mannat Garg 4 years, 1 month ago (9394009)

http://cbseacademic.nic.in/sqp_classx_2021-22.html

0 Thank You

ANSWER

Why did the happy prince cry?

Posted by Kurva Anji 4 years, 1 month ago (12266668)

CBSE > Class 09 > English Lang & Lit. (184)

3 answers

Jeevan Gadnayak 4 years, 1 month ago (12183104)

nice

0 Thank You

Abel Sinilal 4 years, 1 month ago (12266988)

The statue of happy prince was weeping because they have set me up here so high that I can see the ugliness and all the misery of my city

5 Thank You

K_Hushii 🍁 4 years, 1 month ago (11720131)

The statue of the happy prince was weeping because he had been alive , he had not konwn any sorrow,

1 Thank You

ANSWER

Give me the guide of hindi book abhi vyakti or madhyam

Posted by Lakshay Yadav 3 years, 9 months ago (12266672)

Haryana Board > Class 11 > हिंदी कोर

3 answers

Sanjana Sanjana 2 years, 4 months ago (14643737)

,mj

0 Thank You

Harsh Sharma 4 years ago (12560043)

kskdkw

1 Thank You

Sachin Choudhary 4 years, 1 month ago (12345920)

Huu

1 Thank You

ANSWER

3. A triangle PQR, which is right at P such that ZQ = 22PRQ. And perimeter of APQR is 7√3(√3-1)cm then what is its area? (C) 49√3 cm² (A) 27(√3-1) cm² 49 (D) 1/2 √3 cm² 2 27 (B) ²7 (√3-1) cm²

Posted by Uday Thakur 4 years, 1 month ago (12248492)

CBSE > Class 09 > Mathematics

0 answers

ANSWER

I need mcq for Tamil.

Posted by Menaga Menaga 4 years, 1 month ago (12258779)

CBSE > Class 10 > Regional Language

0 answers

ANSWER

Were the chief cities chief of the Harappan civilization

Posted by Maya Sahu 4 years, 1 month ago (12266174)

UP Board > Class 06 > सामाजिक विज्ञान

2 answers

Supriya Yadav Supriya Yadav 1 year, 11 months ago (15147969)

Answer

0 Thank You

Vansh Goswami 4 years, 1 month ago (12364207)

Manav ne Aaj jalana se sikha hindi me

0 Thank You

ANSWER

What is known as astroids for 6th ncert

Posted by Anushka Lad 4 years, 1 month ago (12217829)

CBSE > Class 06 > Social (OLD)

2 answers

Fathima Naja Ak 4 years, 1 month ago (11329724)

Asteroids are small solid objects revolving around the Sun in orbits. They are also known as planetoids or minor planets. Millions of asteroids have been found between the orbits of Mars and Jupiter

0 Thank You

Shreya Chandwad 4 years, 1 month ago (11606584)

Apart from the stars, planets and satellites there are numerous tiny bodies which also move around th sun .

0 Thank You

ANSWER

collect information about innovative step and discovery that can improve our system of agriculture to a lots in coming future

Posted by Nidhi Kumari 4 years, 1 month ago (12258905)

CBSE > Class 10 > Social Science