Question

Can someone please help me with this I am quite stuck thanks

Answer 1

The mass remains the same

Step-by-step explanation:

Answer 2

The mass remains the same since stoichiometrically one mole reacts and one mole is formed

Step-by-step explanation:

Calcium chloride is reacting with Sodium sulphate to form a white precipitate of calcium sulphate.

`{ \sf{CaCl _(2) + Na_(2) SO_(4) → CaSO _(4) + 2NaCl}}`

From the equation, 1 mole of calcium chloride forms 1 mole of calcium sulphate.

R.F.M of CaCl2 = 40 + (35.5×2) = 111

R.F.M of CaSO4 = 40 + 32 + (16×4) = 136

R.F.M of Na2SO4 = (23×2) + 32 + (16×4) = 142

R.F.M of 2NaCl = 2[23 + 35.5] = 117

`{ \sf{(r.f.m \: of \: rectants) = (r.f.m \: of \: products)}} \\{ \sf{ (mass \: of \: rectants) = (mass \: of \: products)}} \\ \\ { \sf{(111 + 142) = (136 + 117)}} \\ { \sf{300.23 = x}} \\ \\ { \sf{x = (300.32)/((111 + 142)) * (136 + 117) }} \\ \\ { \sf{x = (300.32)/(253) * 253 }} \\ \\ { \sf{x = 300.32}}`