Question 1
Assume that an aqueous solution of hydroxide ion, OH
-, represented by unshaded spheres, is allowed to mix with a solution of an acid, H
nA, represented by gray spheres. Three possible outcomes are represented by boxes (a)-(c), where the black spheres represent A
n-, the anion of the acid. For clarity H
2O molecules are not shown.
Which outcome corresponds to the reaction:
HCN + OH
- → H
2O + CN
-?
◦ box (a)
◦ box (b)
◦ box (c)
◦ None of these
Question 2
Assume that an aqueous solution of hydroxide ion, OH
-, represented by unshaded spheres, is allowed to mix with a solution of an acid, H
nA, represented by gray spheres. Three possible outcomes are represented by boxes (a)-(c), where the black spheres represent A
n-, the anion of the acid. For clarity H
2O molecules are not shown.
Which outcome corresponds to the reaction:
H
2SO
4 + 2 OH
- → 2 H
2O + SO
42-?
◦ box (a)
◦ box (b)
◦ box (c)
◦ None of these
The pH of some aqueous fluid
The Spiral (Solution)
Benedict's Solution
A sphere represented by means of modeling.
Solution to Physics problem
What is the molarity (in mol/L) of the NaOH solution?