The stiffness is caused by various natural water? How Device

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Uploaded: 19.06.2012
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Question 1. What is the cause of various rigidity of natural waters? How to eliminate the time-ing and constant hardness of the water? Write the corresponding equations of the reaction. As quantitatively characterized the water hardness? Question 2. What can be dissolved Zn (OH) 2? Create molecular and ionic equations corresponding reaktsiy.Vopros № 10. Can filling receptacles chloro by displacement of which the water solution of sodium chloride (NaCl), sodium hydroxide (NaOH), air?

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