A 135 mg sample of a metal alloy containing Cu (63.55 g/mol) was dissolved in acid and diluted to a volume of 250.0 mL. Measurement with a Cu+ ISE resulted in a potential of -86.0 mV. Exactly 5.00 mL of 1.00 x 10-2M Cut standard was added to the 250.0 mL solution and the potential on the ISE became -52.7 mV. Calculate the percentage of copper in the alloy.

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)