Usually a disilicate shares only one oxygen of the silicate unit. But if in the disilicate unit, two O atoms are shared, then the formula of its salt with potassium will be:
A
K6Si2O7
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B
K4Si2O6
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C
K2Si2O6
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D
K6Si2O8
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Solution
The correct option is BK4Si2O6 Four oxygen atoms have a negative charge, therefore, the number of K+ needed will be 4.