The answer is d for the answer
Mass to mass: moles A x(mole ratio of B/A) and mass to mole: extract the data from the question
Answer:
no of moles = <u>volume in cm3 x concentration in</u> <u>mol/dm3 or M </u>
1000
no of moles =<u> mass</u>
molar mass
<u>mass</u>
molar mass =<u> vol x con</u>
1000
molar mass of ca(oh)2 = 74 g/mol
<u>4.9</u><u> </u><u>=</u><u> </u><u>vol</u><u> </u><u>x</u><u> </u><u>3</u><u>.</u><u>8</u><u> </u>
74. 1000
= 17.42 g
Answer:
a) solubility increases
b) solubility decreases
c) solubility increases
Explanation:
I) Fe^3+(aq) + 3Br^- --------> FeBr3 (aq) solubility increases
II) Fe^3+(aq) + 3OH^- ---------> Fe(OH)3(s) solubility decreases
III) Fe^3+(aq) + 6CN^- -----------> [Fe(CN)6]^3- (aq) solubility increases
The ionic equations shown above shows the possible changes in solubility when Fe(OH)3 is added to each of the solutions mentioned in the question.