187. The reading of a hydrometer immersed in a solution of hydrochloric acid at a temperature of 15 ° C is 1.090. What is the acid concentration? How much of this acid should be taken to prepare 3.6 kg of an 8.3% solution?
1. 1.66 kg 18% acid
2. 1.66 kg 20% acid
3. 2.06 kg 18% acid

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