Question

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. $K_{6}S{i}_2{O}_7$
• B. $K_{4}S{i}_2{O}_6$
• C. $K_{2}S{i}_2{O}_6$
• D. $K_{6}S{i}_2{O}_8$
  
  

Answer 1

The correct option is B $K_{4}S{i}_2{O}_6$


Four oxygen atoms have a negative charge, therefore, the number of $K^{+}$ needed will be 4.