wat is the formula of washing soda,caustic soda,common salt,limestone Share with your friends Share 0 Charms answered this Sodium carbonate Formula is Na 2 CO 3 0 View Full Answer Charms answered this Caustic soda Formula is NaOHCommon table salt is sodium chloride. The formula is: NaCl and Limestone - Calcium Carbonate - Ca(CO)3 hope it helpzzz... 1 Vignesh R. answered this The formula for washing soda is hydrated sodium carbonate:Na2CO3.10H2O 0 ravikrianb3... answered this caustic soda-NAOH 0 Vignesh R. answered this what is answer for : Prove that ( sinA + cosecA)2 + (cosA + secA)2 = 7+tan2A+cot2A . 1