Question

Plz... answer.......​

Answer 1

$\large\star\boxed{\bf{\green{\underline{\underline{◾\: GIVEN\:◾}}}}}$

Cu + HNO3 -----> Cu(NO3)2 + NO2 +H2O

$\large\star\boxed{\bf{\green{\underline{\underline{◾\: TO\: FIND\:◾}}}}}$

BALANCED EQUATION.

$\large\star\boxed{\bf{\green{\underline{\underline{◾\: SOLUTION\:◾}}}}}$

So let us first learn how to balance an equation.

STEPS IN BALANCING A CHEMICAL EQUATION:-

• Identify the most complex substance.

Here the most complex substance is Copper Nitrate Cu(NO3) 2

• Beginning with that substance, choose an element(s) that appears in only one reactant and one product, if possible. Adjust the coefficients to obtain the same number of atoms of this element(s) on both sides.

Let's begin with Oxygen (O).

First balance oxygen on both the sides.

• Balance polyatomic ions (if present on both sides of the chemical equation) as a unit.

So, till now it is coming,

Cu + HNO3 ---> Cu(NO3)2 + 2NO2 + 2H2O

• Balance the remaining atoms, usually ending with the least complex substance and using fractional coefficients if necessary. If a fractional coefficient has been used, multiply both sides of the equation by the denominator to obtain whole numbers for the coefficients.

Now only hydrogen is left to get balanced.

So by balancing hydrogen on both the sides we get,

Cu + 4HNO3 ---> Cu(NO3)2 + 2NO2 + 2H20

• Count the numbers of atoms of each kind on both sides of the equation to be sure that the chemical equation is balanced.

By counting both the sides we are sure that our equation is balanced.

SO OUR BALANCED EQUATION IS,

Cu + 4HNO3 ------> Cu(NO3)2 + 2NO2 + 2H2O