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Sodium oxide reacts with water to produce sodium hydroxide. 20 . 0 g of sodium oxide is dissolved in 500 mL of water. Neglecting the change in volume, the concentration of the resulting NaOH solution is _________ × 10 - 1 M . (Nearest integer) [Atomic mass : Na = 23 . 0 , O = 16 . 0 , H = 1 . 0 ]

Correct answer

0

Step-by-step solution

Na 2 O + H 2 O → 2 NaOH According to reaction 20 62 mole of Na 2 O gives 40 62 mole of NaOH so molarity of NaOH solution is = n NaOH V ml × 1000 = 40 62 × 1000 500 = 80 62 = 1 . 29 M ≈ 1 . 3 M

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