The percentage composition `SiO_(2)` silica in the sample of clay `(Al_(2)O_(3)cdot K_(2)O cdot 6SiO_(2))` is

Question

The percentage composition `SiO_(2)` silica in the sample of clay `(Al_(2)O_(3)cdot K_(2)O cdot 6SiO_(2))` is

The percentage composition `SiO_(2)` silica in the
sample of clay `(Al_(2)O_(3)cdot K_(2)O cdot 6SiO_(2))` is
A. `16.90%`
B. `18.35%`
C. `64.75%`
D. `25.52%`

Monjur Alahi

6 views

2025-01-04 04:42

1 Answers

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Salim Ahmed Kawsar · Accepted Answer · 2023-02-05T15:29:48+06:00

Salim Ahmed Kawsar

Correct Answer - C
Molar mass of `Al_(2)O_(3)cdot K_(2) O cdot 6 SiO_(2)`
`=(2xx27+3xx16)+(2xx39+16)+6(28+2xx16)`
` =102+94+360`
`= 556` g
mass % of `Al_(2)O_(3)=102/556xx100 = 18.35 %`
Mass % of `K_(2) O = 94/556 xx100 = 16.90%`
Mass % of `SiO_(2) = 360/556xx 100 =64.75 %`

6 views Answered 2023-02-05 15:29