Assuming that zinc displaces the hydrogen as the cation in HCl, and assumes its natural charge of 2+, it requires two Cl- to make the zinc chloride compound. Therefore, we know there need to be two HCl atoms in the equation, and that the resulting compound ZnCl2 requires us to account for two lost hydrogen atoms, which will come out as natural diatomic gas:
Zn(s) + 2HCl(aq) --> ZnCl2(aq) + H2(g)
Answer:
0.85 mol/L.
Explanation:
- Molarity is defined as the no. of moles of solute dissolved in a liter of the solution.
<em>M = (no. of moles of solute)/(Volume of the solution (L))</em>
no. of moles of calcium phosphate = 2.125 mol.
Volume of the solution = 2.5 L.
<em>∴ M of calcium phosphate</em> = (2.125 mol)/(2.5 L) = <em>0.85 mol/L.</em>
Larger cells have smaller surface area to volume ratios