Soda and lime are added to glass batch in the form of soda ash (Na2 diaxide (Co2

Question

Soda and lime are added to glass batch in the form of soda ash (Na2 diaxide (Co2), the resulting products being soda and lime. Compute the weight of soda ash and limestone that must be added to 110 lbm of Co3) and limestone (Caco3). During heating, these two ingredients decompose to give off carbon glass of composition 73 wt% SiO2, 18 wt% Na20, and 9 wt% Cao. quartz (SO2) to yield a Part 1 your mathematics. You have the weight percent of these two constituents given in the problem, but you must convert them to the 1bm of each so that you can and ime that should be added to the SiO2. You know the weight percent of both Na20 and Cao since that is given in the problem, and you are also given the weight of SI02. Think back to the work technique you can use to convert from weight percent to pounds (mass). If you are having difficulty with this problem, you may wish to revie Solving Simultaneous Equations you did in Chapter 4 and review your homework from that chapter. Think about what You are to compute the weight (in ibm) of soda ash and limestone that must be added to a certain amount of quartz to produce a compute the Ibm of both Nag0 and Cao that is necessary for the particular glass composition that is gliven in the problem. What is the weight in Ibm of (a) Na2O particular glass composition.First 22.97 (b) Cao 12.16

Explanation / Answer

Since the wight of SiO2 is given as 110 lb and the desired composition is 73%, the total glass mass would be,

110/ 0.73 = 150.7 lb

Since 18% of this mass must be Na2O, the Na2O mass required is,

150.7 * 0.18 = 27.12 lb

Since 9% of the mass must be CaO, the CaO mass required is,

150.7 * 0.09 = 13.56 lb

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