pH of salt and Buffer

pH of salt and Buffer - Ca(OH)2 has a low solubility in...

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Ca(OH) 2 has a low solubility in water. How can it be a strong base? Strength is defined by % ionization. Even though only a small amount of Ca(OH) 2 dissolve all that dissolves also dissociates. What does the strength of an acid or base indicate about its conjugate? Conjugates have opposite strength. I.e. the conjugate of a strong acid is a weak base, the conjugate of a strong base is a weak acid. What is a buffer? A buffer is a pair of substances in solution that resist changes in pH when either acid or bas is added. This pair of substances is often a weak acid and a salt of the acid. Give an example of a buffer. Acetic acid (HC 2 H 3 O 2 ) plus sodium acetate (NaC 2 H 3 O 2 ). Write the general equation important in buffer systems. HA(aq) ↔ H + (aq) + A (aq) Explain how a buffer resists changes in pH. With the addition of H + , HA(aq) ↔ H + (aq) + A (aq) shifts left, removing some of the added H + . Conversely, added OH removes H + by forming water. This shifts the equilibrium to the
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pH of salt and Buffer - Ca(OH)2 has a low solubility in...

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