Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Hardness in groundwater is due to the presence of metal ions, primarily Mg2 and Ca2 . Hardness is generally reported as ppm CaCO3 or mmol/L Ca2 . To measure water hardness, a sample of groundwater is titrated with EDTA, a chelating agent, in the presence of the indicator eriochrome black T, symbolized here as In. Eriochrome black T, a weaker chelating agent than EDTA, is red in the presence of Ca2 and turns blue when Ca2 is removed.
A 50.00-mL sample of groundwater is titrated with 0.0900 M EDTA. Assume that Ca2 accounts for all of the hardness in the groundwater. If 13.10 mL of EDTA is required to titrate the 50.00-mL sample, what is the hardness of the groundwater in molarity and in parts per million of CaCO3 by mass?
caculate the amount of heat liberated ( in kj) from 335g of mercury when it cools from 59.0 to 12.0 c
Imagine that you have a 5.50 L gas tank and a 2.00 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch
55.0 mL of a 1.70 M solution is diluted to a volume of 278 mL. A 139 mL portion of that solution is diluted using 175 mL of water. What is the final concentration.
A solution is prepared by mixing 77.0 mL of 5.00 M HCl and 11.0 mL of 8.00 M HNO3. Water is then added until the final volume is 1.00 L. Calculate [H+], [OH -], and the pH for this solution.
A 1.0 ounce piece of chocolate contains 15 of caffeine, and a 6.0 ounce cup of regular coffee contains 105 of caffeine.How much chocolate would you have to consume to get as much caffeine as you would from 5.0 cups of coffee?
Isotope 1 has a mass of 120.9038 amu and a relative abundance of 57.4%, and isotope 2 has a mass of 122.9041 amu. What is the atomic mass of this element?
What is the equilibrium constant Kc of this reaction? Use an ICE table with numbers.
what is the pressure in a gas containter that is connected to an open-end manometer if the pressure of the atmosphere is 722 torr and the level of mercury in the connected to the container is 8.60cm
a .50 g sample of vegetable oil is placed in a calorimeter when the sample is burned 18.9kJ are given off what is the caloric value of the oil.
A gas occupying 28 mL at standard conditions is heated to 13?C while the pressure is reduced to 0.84119 atm. What is the new volume occupied by the gas.
An empty 2.0 L soda bottle is tightly capped at 25 degrees C and 732 mmHg. If the bottle is heated to 100 degrees C what is the pressure in the bottle
A packet of the same soup sold in the U.S. would have the same nutritional information in kilocalories per cup. There are two cups in a pint. How many nutritional calories would be quoted per cup of prepared soup?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd