Sodium Carbonate. Sodium carbonate is a sodium salt of carbonic acid and a strong base. It is supplied as a white, odorless powder that is hygroscopic and very soluble in water producing a strong alkaline solution.
1. to refrain from claiming or insisting on; forgo: to waive one's rank. 2. to relinquish (a right) intentionally: to waive an option. 3. to put aside, esp. for the time; defer or dispense with: to waive formalities. 4. to dismiss from consideration or discussion. [1250â1300; Middle English weyven < Anglo-French weyver to make a waif (of someone) by forsaking or outlawing (him or her)]
hardship. noun. 1  The condition of lacking necessities or comforts; privation or suffering. 2  A thing or circumstance that causes ongoing or persistent suffering or difficulty: âHives are a great hardship, but they will not injure your vital organsâ (Andrew Weil). 3  See Synonyms at difficulty.