Answer:
1) 0.825 grams is the mass of pure calcium carbonate product collected at the end of the experiment.
2) The mass % calcium carbonate in the tablet is 50.58%.
3) The mass % of calcium in calcium carbonate is 40.00 %.
4) Mass of calcium in a tablet is 0.33 g.
Explanation:
Mass of tablet = 1.631 g
Mass of the watch glass = 46.719 g
Mass of the watch glass + mass of calcium carbonate = 47.544 g.
Mass of calcium carbonate = 47.544 g - 46.719 g = 0.825 g
0.825 grams is the mass of pure calcium carbonate product collected at the end of the experiment.
Mass of calcium carbonate = 0.825 g
Percentage of calcium in tablet:
![\%=\frac{\text{Mass of calcium carbonate }}{\text{Mass of tablet}}\times 100](https://tex.z-dn.net/?f=%5C%25%3D%5Cfrac%7B%5Ctext%7BMass%20of%20calcium%20carbonate%20%7D%7D%7B%5Ctext%7BMass%20of%20tablet%7D%7D%5Ctimes%20100)
![\%=\frac{0.825 g}{1.631 g}\times 100=50.58\%](https://tex.z-dn.net/?f=%5C%25%3D%5Cfrac%7B0.825%20g%7D%7B1.631%20g%7D%5Ctimes%20100%3D50.58%5C%25)
The mass % calcium carbonate in the tablet is 50.58%.
Percentage of calcium in calcium carbonate :
Molar mass of calcium carbonate = 100 g/mol
Atomic mass of calcium = 40 g/mol
Percentage of calcium in calcium carbonate :
![\%=\frac{\text{atomic mass of calcium}}{\text{Molar mass of}CaCO_3}\times 100](https://tex.z-dn.net/?f=%5C%25%3D%5Cfrac%7B%5Ctext%7Batomic%20mass%20of%20calcium%7D%7D%7B%5Ctext%7BMolar%20mass%20of%7DCaCO_3%7D%5Ctimes%20100)
![\%=\frac{40 g/mol}{100 g/mol}\times 100=40.00\%](https://tex.z-dn.net/?f=%5C%25%3D%5Cfrac%7B40%20g%2Fmol%7D%7B100%20g%2Fmol%7D%5Ctimes%20100%3D40.00%5C%25)
The mass % of calcium in calcium carbonate is 40.00 %.
Mass of calcium carbonate = 0.825 g
The mass % of calcium in calcium carbonate is 40.00 %.
Mass of calcium in a tablet : x
![40.00\%=\frac{\text{Mass of calcium in a tablet}}{0.825 g}\times 100](https://tex.z-dn.net/?f=40.00%5C%25%3D%5Cfrac%7B%5Ctext%7BMass%20of%20calcium%20in%20a%20tablet%7D%7D%7B0.825%20g%7D%5Ctimes%20100)
![x=40.00\times \frac{0.825 g}{100}=0.33 g](https://tex.z-dn.net/?f=x%3D40.00%5Ctimes%20%5Cfrac%7B0.825%20g%7D%7B100%7D%3D0.33%20g)
Mass of calcium in a tablet is 0.33 g.