A 500-ML Sample of 2

question 19

Multiple Choice

A 50.0-mL sample of 2.0  10^-4 M CuNO₃ is added to 50.0 mL of 4.0 M NaCN. Cu⁺ reacts with CN^- to form the complex ion Cu(CN) ₃^2-: Calculate the solubility of CuBr(s) (K_sp = 1.0  10^-5) in 1.0 L of 1.0 M NaCN.

• A) 0.33 mol/L
• B) 1.0  10^-6 mol/L
• C) 1.0  10³ mol/L
• D) 1.0 mol/L
• E) none of these

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Definitions:

Managed Float System

An exchange rate system that combines features of freely floating rates with sporadic intervention by central banks.

Bretton Woods Agreement

A 1944 agreement that established fixed foreign exchange rates for major currencies, as well as the IMF and the World Bank.

Gold Standard

A monetary arrangement where the valuation of a country's currency or paper bills is pegged directly to gold.

Bretton Woods System

was a monetary order established in 1944, which set up fixed exchange rates, the International Monetary Fund (IMF), and the World Bank to regulate international financial and monetary affairs.