Use the pull-down boxes to specify states such as (aq) or (s) If a box is not ne

Question

Use the pull-down boxes to specify states such as (aq) or (s) If a box is not needed leave it blank. If no reaction occurs leave all boxes blank and click on "submit" Write the balanced NET IONIC equation for the reaction that occurs when ammonium bromide and sodium hydroxide are combined. This reaction is classified as A. Strong Acid+ Strong Base B. Weak Acid+ Strong Base C. Strong Acid + Weak Base D. Weak Acid + Weak Base The extent of this reaction is: A. Below 50% B, 50% C. Above 50% D.100% Submit Answer Retry Entire Group 8more group attempts remaining

Explanation / Answer

NH4Br + NaOH ? NaBr + NH3 + H2O

NH4+(aq) + Br-(aq) + Na+(aq) + OH-(aq) --> Na+(aq) + Br-(aq) + NH3(g) + H2O(l)

Now, remove the ions that are identical on each side of the arrow.

NH4+(aq) + OH-(aq) --> NH3(g) + H2O(l)

This reaction is classified as a Weak Acid+ Strong Base reaction. Ammonium bromide is a weak acid and so is HF while NaOH is a strong base.

When acids and bases react they neutralize each other.The strength of an acid and a base is very important to determining the extent of the reaction. A strong acid and a strong base completely ionize whereas a weak acid or a weak base only ionize partially. If the acid is weak and the base is strong as in this case, then more acid will be required to neutralize the strong base.

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