Answered

Expand your horizons with the diverse and informative answers found on IDNLearn.com. Our platform is designed to provide reliable and thorough answers to all your questions, no matter the topic.

what is the molarity of a solution of 14.0 g NH4Br in enough H2O to make 150 mL of solution?

Sagot :

Lulu1991idn
The molarity of a solution equals to the mole number of the solute/the volume of the solution. For NH4Br, we know that the mole mass is 98. So the molarity is (14/98) mol /0.15 L=0.95 mol/L.

Explanation:

Molarity is defined as the number of moles per liter of solution.

Mathematically,         Molarity = [tex]\frac{no. of moles}{volume of solution in liter}[/tex]

Since it is given that the molarity of a solution of 14.0 g and volume is 150 mL or 0.15 L.

Whereas number of moles = [tex]\frac{mass}{molar mass}[/tex]

So, molar mass of [tex]NH_{4}Br[/tex] is 97.94 g/mol.

Thus,      number of moles = [tex]\frac{14.0 g}{97.94 g/mol}[/tex]

                                            = 0.142 mol

Therefore, calculate the molarity as follows.

              Molarity = [tex]\frac{no. of moles}{volume of solution in liter}[/tex]  

                             = [tex]\frac{0.142 mole}{0.15 L}[/tex]

                              = 0.946 mol/L

Hence, we can conclude that molarity of the solution is 0.946 mol/L.

We appreciate your contributions to this forum. Don't forget to check back for the latest answers. Keep asking, answering, and sharing useful information. Thank you for visiting IDNLearn.com. We’re here to provide accurate and reliable answers, so visit us again soon.