100 ml of a 1 m hcl and 100 ml of a 5m nacl solution are mixed. what is the final molarity of the chloride ions?
a.) .5m
b.) 2m
c.) 3m
d.) 4m

3M

Explanation:

Because HCl and NaCl do not react with each other, the final number of the Cl⁻ ions is equal to the sum of the ions of each starting reagent:

Cl⁻ moles from HCl ⇒0.100 L * 1 M = 0.1 moles Cl⁻

Cl⁻ moles from HCl ⇒0.100 L * 5 M = 0.5 moles Cl⁻

We add up the volumes from each solution:

And finally calculate the final molarity of Cl⁻ ions:

not clear

the correct option is c.

isotopes refers to different forms of the same element with the same atomic number but different mass number as a result of difference in their neutron numbers. isotopes have different relative atomic mass but share the same chemical properties.