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Ameyelshrkawy

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اجابة 1 مشاهدة 37

An ionic compound contains 29.08% sodium, 40.56% sulfur and 30.36% oxygen by mass. What is the formula of the sulfur – containing anion in the compound?

$A. S_{2}O_{3}^{2-}$

$B. S_{2}O_{4}^{2-}$

$C. S_{2}O^{2-}_{5}$

$D.S_{2}O^{2-}_{6}$

13. You have below five neutralization reactions between the acid-base pairs in dilute aqueous solutions:

$(1)CH_{3}COOH + NaOH \rightarrow$

$(2)HNO_{3}+ Mg(OH)_{2}\rightarrow$

$(3) H_{3}PO_{4}+Ba(OH)_{2}\rightarrow$

$(4)HCl + KOH \rightarrow$

$(5)H_{2}CO_{3}+Li OH\rightarrow$

In which of these reactions, the net ionic equation is:

$H^{+} + OH^{-}\rightarrow H_{2}O$

A.Reaction 2 only

B. Reactions 1, 4 and 5

C. Reactions 2 and 3

D.Reaction 4 only

14. Which of the following equations represents the net ionic equation for the reaction of nitric acid with aluminum hydroxide?

$A.3H^{+} + Al(OH)_{3}_{(s)} \rightarrow Al^{3+} + 3H_{2}O$

$B.3HNO_{3} + Al (OH)_{3}_{(s)}\rightarrow A L(NO_{3})_{3} + 3H_{2}O$

$C. HNO_{3}+ OH^{-}\rightarrow NO_{3}^{-} + H_{2}O$

$D.H^{+} + OH^{-}\rightarrow H_{2}O$

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