Astock solution of cu2+(aq) was prepared by placing 0.8875 g of solid cu(no3)2∙2.5 h2o in a 100.0-ml volumetric flask and diluting to the mark with water. what is the concentration (in m) of cu2+(aq)in the stock solution? molar mass of cu = 63.55 g/mol.

3.816 × 10⁻³ M

Explanation:

A stock solution of Cu²⁺(aq) was prepared by placing 0.8875 g of solid Cu(NO₃)₂∙2.5H₂O in a 100.0-mL volumetric flask and diluting to the mark with water. What is the concentration (in M) of Cu²⁺(aq)in the stock solution?

We can establish the following relations:

The moles of Cu²⁺ in 0.8875 g of Cu(NO₃)₂∙2.5H₂O are:

The molarity of Cu²⁺ is:

it means there are 3 atoms of oxygen

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.