For many weak acid or weak base calculations, you can use a simplifying assumption to avoid solving quadratic equations. K, = THAI - x * THAJ [НА] — х НА] Classify these situations by whether the assumption is valid or the quadratic formula is required. Assumption is valid Quadratic formula is required Answer Bank [HA] = 0.005 M [HA] = 0.005 M Ka = 1 x 10-4 [HA] = 0.05 M [HA] = 1 M [HA] = 0.05 M Ka = 1 × 10¬4 Ka = 1 x 10-3 Ka = 1 x 10-3 Ka = 1 × 10-5

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Chapter4: Chemical Reactions
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Problem 4.48QP: Complete the right side of each of the following molecular equations. Then write the net ionic...
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For many weak acid or weak base calculations, you can use a simplifying assumption to avoid solving quadratic equations.
x²
Ка
[HA]
[HA]
Classify these situations by whether the assumption is valid or the quadratic formula is required.
Assumption is valid
Quadratic formula is required
Answer Bank
[HA] = 0.05 M
[HA] = 1 M
[HA] = 0.05 M
[HA] = 0.005 M
[HA] = 0.005 M
%3D
Ka = 1 x 10-4
Ka = 1 × 10-3
Ka = 1 × 10–3
Ka = 1 x 10-5
Ka = 1 × 10-4
Transcribed Image Text:For many weak acid or weak base calculations, you can use a simplifying assumption to avoid solving quadratic equations. x² Ка [HA] [HA] Classify these situations by whether the assumption is valid or the quadratic formula is required. Assumption is valid Quadratic formula is required Answer Bank [HA] = 0.05 M [HA] = 1 M [HA] = 0.05 M [HA] = 0.005 M [HA] = 0.005 M %3D Ka = 1 x 10-4 Ka = 1 × 10-3 Ka = 1 × 10–3 Ka = 1 x 10-5 Ka = 1 × 10-4
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