Answered

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6- the chemical formula of carbonate salt contain monovalent cation is ..........
O XCO3
O X2HCO3
O X2CO3
O X(HCO3)2
7- after adding sodium hydroxide into hydrochloric acid, pH will
O Increases
O decreases
O remains constant
8- the reaction between calcium hydroxide and Nitric acid forming ........
o Ca(NO2)2
O Ca(NO3) O Ca(NO3)2
o Ca(NO2)

Sagot :

Answer:

6-

[tex]{ \sf{XCO _{3} }}[/tex]

because X has only one positive charge.

7-

[tex]{ \sf{increases}}[/tex]

because there is increase in hydroxyl ions which decrease the acidity or hydrogen strength of hydrochloric acid.

8-

[tex]{ \sf{Ca(NO _{3} ) _{2} }}[/tex]

Calcium has a valency of 2 and nitrate ion radicle has valency of 1

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