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QuestionChemistry

Is bleach an acid or a base? Explain why.
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Step 1:
I'll solve this problem step by step, explaining the chemical properties of bleach:

Step 2:
: Identify the Chemical Composition of Bleach

Bleach is typically sodium hypochlorite ($$NaClO$$), which is a basic solution.
It is commonly used as a cleaning and disinfecting agent.

Step 3:
: Understand the Dissociation of Sodium Hypochlorite

NaClO \rightarrow Na^{+} + ClO^{-}
When dissolved in water, sodium hypochlorite dissociates into sodium and hypochlorite ions:

Step 4:
: Analyze the Hypochlorite Ion's Behavior

ClO^{-} + H_{2}O \rightarrow HClO + OH^{-}
It can accept a proton (H^{+}) from water, which increases the concentration of hydroxide ions (OH^{-}):

Step 5:
: Determine pH Characteristics

Because the solution produces hydroxide ions, bleach has a basic pH, typically around 11 - 13, which is significantly above the neutral pH of 7.

Final Answer

Bleach is a base due to the basic nature of the hypochlorite ion, which increases hydroxide ion concentration when dissolved in water.