Determine what fraction of the cyanide is in the cn-form

Reference no: EM13310543

Cyanide solutions used for heap leaching are made up of sodium cyanide (NaCN). The sodium cyanide solution ([NaCN]-total = 0.01 M) is kept at pH 10.4. The pH is kept high to keep the cyanide in the CN- form. If CN protonates by the reverse of the HCN dissociation reaction,

HCN = H+ + CN- pKa = 9.24

and forms HCN, it will volatilize, and if it volatilizes, HCN can poison mine workers. At pH 10.4, what fraction of the cyanide is in the CN- form?

Calculate the fraction as [CN-] / [NaCN]-total.

Reference no: EM13310543

Questions Cloud

Evaluate the energy required to heat of ethane gas : Calculate the energy required to heat 1.30 kg of ethane gas (C2H6) from 27.0°C to 78.0°C first under conditions of constant volume and then at a constant pressure of 2.00 atm

Provide a comprehensive record of using sql : Learning Objectives: The purpose of Project 3 is to enable the students to gain extensive experience with using SQL to design and query databases.

What is the change in length in the unloaded direction : A brass cube (E=100 GPa, v = 0.25(Poisson's ratio)) is 100 mm long per side. A compressive force of 100kN is applied to one side, while a tension force of 200 kN is applied to a second side.

What is the electric force on the top left charge : Starting from the top left corner and moving clockwise the charges are -10 uC, -10 uC, 5 uC, and 5 uC. What is the electric force on the top left charge due to all the other charges

Determine what fraction of the cyanide is in the cn-form : The sodium cyanide solution ([NaCN]-total = 0.01 M) is kept at pH 10.4. The pH is kept high to keep the cyanide in the CN- form. If CN protonates by the reverse of the HCN dissociation reaction,

Describe what mass of carbon dioxide is produced : What mass of carbon dioxide is produced from the complete combustion of 7.00×10?3g of methane

Determine what size motor-horsepower is required for mixer : A chemical mixing basin is to be designed to blend chlorine and treated wastewater. The basin flow is 700 gallons per minute and the basin dimensions are 5 feet by 5 feet by 5 feet water depth.

Explain base are required to reach the equivalence point : Consider the titration of 44.2mL of 0.240M HF with 0.180 M NaOH . Calculate the at each of the following points. A) How many milliliters of base are required to reach the equivalence point

Find the electric field inside the void : a spherical void of radius r has cut inside the sphere, find the electric field inside the void if its center is displaced by vector R

User Account

All Pages