Common Acids and Bases Six Common Strong Acids Strong acids ionize 100 in water

Common acids and bases six common strong acids strong

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Common Acids and Bases Six Common Strong Acids Strong acids ionize 100% in water. Strong acids are strong electrolytes. Example: HCl( aq ) H + ( aq ) + Cl - ( aq ) Strong acids are strong electrolytes. Their solutions ocnduct electricity well.
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18 Weak Acids Weak acids ionize very little in water. Weak acids are weak electrolytes. Weak acids mostly remain in their molecular form in water. Ex. HF in H 2 O remains mostly HF molecules Example: HF( aq ) H + ( aq ) + F - ( aq ) Weak acids: T heir solutions conduct electricity, but not well. Strong bases § A strong base produces hydroxide ions in solution for each formula unit of the original base. NaOH (s) → Na + (aq) + OH (aq) § The common strong bases are the soluble hydroxide salts: group I hydroxides: LiOH, NaOH, and KOH group II hydroxides: Sr(OH) 2 and Ba(OH) 2 Strong bases dissociate 100% in water. They are strong electrolytes . Weak bases § A weak base is a molecular compound that reacts with water to produce OH - ions in solution but where the ionization is not complete. § Example: NH 3 NH 3 (g) + H 2 O( l ) NH 4 + (aq) + OH (aq) § Other example: Mg(OH) 2 , NaHCO 3 Weak bases only ionize a small percent in water. They mostly remain in the form of molecules. They are weak electrolytes.
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19 Learning check: Which of the following is a weak base? a) HClO 4 b) H 2 CO 3 c) LiOH d) NH 3 e) KBr f) HF Learning check: which of the following is a weak electrolyte?* A. NaCl B. KOH C. HF D. Sugar molecules E. HClO 4 Acid - Base Neutralization General reaction Acid + Base Salt + Water HCl + NaOH NaCl + H 2 O a type of metathesis reaction HCl + NaOH NaCl + HOH Write the net ionic equation
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20 K + (aq) + Br (aq) Strong acid - Strong base neutralization: HBr(aq)/KOH(aq) Molecular Equation: Total Ionic Equation: HBr(aq) + KOH(aq) KBr (aq) + H 2 O( l ) H + (aq) + Br (aq)+ K + (aq) + OH (aq) + H 2 O( l ) Net Ionic equation: H + (aq)+ OH (aq) H 2 O ( l ) / / / / Reactions of Acids & Bases: Acid-Base Neutralization This applies to ALL reactions of STRONG acids and bases. What is the net ionic equation for the reaction between HClO 4 and KOH? A. HClO 4 + KOH KClO 4 + H 2 O B. H + + OH H 2 O C. HClO 4 + OH ClO 4 + H 2 O D. H + + KOH H 2 O + K + Total Ionic Equation: Reactions of weak acids and strong bases: Molecular Equation: HC 2 H 3 O 2 (aq) + NaOH(aq) NaC 2 H 3 O 2 (aq) + H 2 O( l ) HC 2 H 3 O 2 (aq) + Na + (aq) + OH (aq) Na + (aq) + C 2 H 3 O 2 (aq) + H 2 O( l ) Leave in molecular form Net Ionic: HC 2 H 3 O 2 (aq) + OH (aq) C 2 H 3 O 2 (aq) + H 2 O( l ) / / Reactions of Acids & Bases: Acid-Base Neutralization
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21 Metal carbonate salts react with acids to the corresponding metal salt, water and carbon dioxide gas. 2HCl(aq) + CaCO 3 (s) CaCl 2 (aq) + H 2 CO 3 (aq) H 2 O( l ) + CO 2 (g) Decomposes to Similarly: NaCl(aq) + H 2 O( l ) + CO 2 (g) HCl(aq) + NaHCO 3 (s) acid base salt water Neutralization!!!
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