Question

Soda and lime are added to glass batch in the form of soda ash (Na₂CO₃) and limestone (CaCO₃). During heating, these two ingredients decompose to give off carbon dioxide (CO₂), the resulting products being soda and lime. Compute the weight of soda ash and limestone that must be added to 170 lb_m of quartz (SiO₂) to yield a glass of composition 78 wt% SiO₂, 15 wt% Na₂O, and 7 wt% CaO.

Part 1

You are to compute the weight (in lb_m) of soda ash and limestone that must be added to a certain amount of quartz to produce a particular glass composition.First, compute the lb_m of both Na₂O and CaO that is necessary for the particular glass composition that is given in the problem.

What is the weight in lb_m of:

(a) Na₂O

lbm

(b) CaO

lbm

Part 2

What is the molecular weight in g/mol of the following:

(a) Na₂O

g/mol

(b) Na₂CO₃

g/mol

(c) CaO

g/mol

(d) CaCO₃

g/mol

Part 3

Finally, convert the lb_m of Na₂O and CaO to the pounds (mass) of soda ash and lime that will need to be added to the SiO₂.

What is the weight, in lb_m, of (a) soda ash and (b) lime that will be added to the SiO₂ to make the glass outlined in the problem?

(a)		lbm
(b)		lbm

Answer 1

Since there are some equations, I preferred a handwritten note. Results are tabulated in the answer for your easier understanding. Hope that it is clear for you and it really helped you.

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