Question

the ions present in solution when potassium phosphate, K3PO4 is added to water are?

the coefficent of hydrogen gas after balancing the following equation is ? N2g + H2 g > NH3g

in all chemical changes ?

1. a precipitate forms

2. energy flows between the system to the surrounding

3. a gas may be emitted

4.a colour change

5. all the above

Answer 1

Question 1:

K3PO4 is a water solube salts, hence it will dissociate into ions to form

Hence the ions presents are K+ and PO4(3-)

Question 2:

The reaction is

Balance the nitrogen first by multiplying the NH3 by 2, this will lead to 2 * 3 (6 atoms of H on the right hand side) and only 2 on left side. To balance the remaining, make the coefficient of H2 to 3 to get 3*2 = 6 atoms of H

Hence the balanced reaction will be

The coefficient of H2 in the balanced reaction must be 3

Question 3:

The correct answer must be all the above. Since all the scenarios happen in the case of chemical reaction

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