Homework Help

how do you know whether the product is a solid, liquid, or gas at room temperature?...

user profile pic

sassy96 | Student, College Freshman | (Level 1) Salutatorian

Posted September 9, 2012 at 7:30 PM via web

dislike 1 like

how do you know whether the product is a solid, liquid, or gas at room temperature? What is the balanced chemical equation for the reaction? Regarding when the metallic element sodium combines with the non metallic element iodine, I2(s).

1 Answer | Add Yours

user profile pic

ncchemist | eNotes Employee

Posted September 24, 2012 at 2:51 AM (Answer #1)

dislike 1 like

The chemical equation for sodium reacting with iodine is:

2Na + I2 --> 2NaI

Solid metallic sodium combines with solid iodine to produce solid sodium iodide.  Sodium is a group 1 metal and as such it readily loses an electron to become the highly stable sodium cation (Na+).  Iodine is a halogen and as such it readily gains an electron to become the highly stable iodide anion (I-).  The sodium cation and the iodide anion combine to form sodium iodide (NaI).  We know that this is a solid at room temperature since it is an ionic salt and as such has an extremely high melting point.  It is also highly soluble in water.

Sources:

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes