Question

(a) Each tablet contains the same number of moles of CaCO 3 and MgCO 3 . One tablet reacted with excess hydrochloric acid to produce 0.24 dm 3 of carbon dioxide at r.t.p.

CaCO 3 + 2HC l → CaC l 2 + CO 2 MgCO 3 + 2HC l → MgC l 2 + CO 2 + CO 2 + CO 2

(i) Calculate how many moles of CaCO 3 there are in one tablet.
number of moles CO 2 = ?

number of moles of CaCO 3 and MgCO 3 = ?

number of moles of CaCO 3 = ?​

Answer 1

Answer:

(a) Each tablet contains the same number of moles of CaCO 3 and MgCO 3 . One tablet reacted with excess hydrochloric acid to produce 0.24 dm 3 of carbon dioxide at r.t.p.

• answer in image

(i) Calculate how many moles of CaCO 3 there are in one tablet.

number of moles CO 2 = ?

• CaCO³

atomic mass = 40 + 12 + 3 × 16

=100

moles = gram weight /atomic mas

Given = 20/100

= 0.2 moles