First calculate the number of moles of CaBr2 given the
molar mass of 199.89 g/mol.
moles CaBr2 = 0.9182 g / (199.89 g / mol) = 4.60 x 10^-3
mol
We see that each CaBr2 contains only 1 mole of Ca, so the
moles of Ca is also:
moles Ca+ = 4.60 x 10^-3 mol
So the molarity of this is:
Molarity Ca+ = 4.60 x 10^-3 mol / 0.500 L
<span>Molarity Ca+ = 9.19 x 10^-3 M</span>
Which of the following is correctly abbreviated SI unit describing the mass of an object?
A) kg
Place the solid on an electronic balance. Read the balance reading.
Answer: Ca(OH)2 (aq) + H2SO4 (aq) ----------> CaSO4(aq) + 2H2O(l)
Explanation:
Since this is a neutralization reaction, the end product would be salt and water. In this equation Calcium will displace hydrogen from the acid because it is more reactive, resulting in the formation of CaSO4 (salt), while the displaced H2 molecule combines with OH molecules to form water.
The equation of the reaction is thus;
Ca(OH)2 (aq) + H2SO4 (aq) ----------> CaSO4(aq) + H2O(l), in other to balance it, we add ''2'' to the water molecule in the right hand side of the equation.
Balance equation is
Ca(OH)2 (aq) + H2SO4 (aq) ----------> CaSO4(aq) + 2H2O(l)
