
How much positive and negative charge is there in a water molecule ?
Answer
429.9k+ views
3 likes
Hint:We know that water is a polar molecule as it has some amount of positive charge at one end of the molecule and some amount of negative charge at the other end of the molecule. The number of electrons in a neutral atom is equal to the number of protons. Use all these concepts to solve the question.
Complete step by step answer:
Let us assume we have a cup of water. Now we know that the molecular mass of water is (as molecular mass oh and that of therefore molecular mass of comes out to be ). Now, each molecule of water contains electrons and protons. If we say that in the cup there are molecules of water then we can write as,
where is the Avogadro constant.
Assume that the cup is 250 ml. By using this information we can calculate the value of which comes out to be,
Now,
Total number of protons or electrons in that cup of water can be which equal to
As the charge has a property which tells that the charge is always quantized, we can calculate the total positive or negative charge by using the formula of quantization.
Therefore, a water molecule has an equal amount of positive and negative charge which is .
Note:Water is formed by the sharing of electrons between two hydrogen atoms and one oxygen atom through the formation of a covalent bond. Due to this kind of sharing, the electrons spend more time moving around the oxygen atom which gives the oxygen side a bit more negative charge in comparison to that on the hydrogen side which makes up the other side of the molecule. Since the electrons are all spending more time with the oxygen atom, the hydrogen atoms are left with a slight positive charge which causes some difference in electronegativity and hence the molecule becomes polar in nature.
Complete step by step answer:
Let us assume we have a cup of water. Now we know that the molecular mass of water is
where
Assume that the cup is 250 ml. By using this information we can calculate the value of
Now,
Total number of protons or electrons in that cup of water can be
As the charge has a property which tells that the charge is always quantized, we can calculate the total positive or negative charge by using the formula of quantization.
Therefore, a water molecule has an equal amount of positive and negative charge which is
Note:Water is formed by the sharing of electrons between two hydrogen atoms and one oxygen atom through the formation of a covalent bond. Due to this kind of sharing, the electrons spend more time moving around the oxygen atom which gives the oxygen side a bit more negative charge in comparison to that on the hydrogen side which makes up the other side of the molecule. Since the electrons are all spending more time with the oxygen atom, the hydrogen atoms are left with a slight positive charge which causes some difference in electronegativity and hence the molecule becomes polar in nature.
Latest Vedantu courses for you
Grade 9 | CBSE | SCHOOL | English
Vedantu 9 CBSE Pro Course - (2025-26)
School Full course for CBSE students
₹37,300 per year
Recently Updated Pages
Master Class 12 Business Studies: Engaging Questions & Answers for Success

Master Class 12 Economics: Engaging Questions & Answers for Success

Master Class 12 Maths: Engaging Questions & Answers for Success

Master Class 12 Biology: Engaging Questions & Answers for Success

Master Class 12 Physics: Engaging Questions & Answers for Success

Master Class 12 English: Engaging Questions & Answers for Success

Trending doubts
A deep narrow valley with steep sides formed as a result class 12 biology CBSE

Why should a magnesium ribbon be cleaned before burning class 12 chemistry CBSE

A renewable exhaustible natural resources is A Coal class 12 biology CBSE

Megasporangium is equivalent to a Embryo sac b Fruit class 12 biology CBSE

Draw a labelled sketch of the human eye class 12 physics CBSE

What is Zeises salt and ferrocene Explain with str class 12 chemistry CBSE
