The acid-dissociation constant of hydrocyanic acid (HCN) at 25.0°C is 4.9 × 10-10. What is the pH of an aqueous solution

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answerhappygod
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The acid-dissociation constant of hydrocyanic acid (HCN) at 25.0°C is 4.9 × 10-10. What is the pH of an aqueous solution

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The acid-dissociation constant of hydrocyanic acid (HCN) at25.0°C is 4.9 × 10-10. What is the pH of an aqueous solution of0.147 M sodium cyanide (NaCN)?
Please write clear and show all the math steps. Thankyou.
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