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1. Express 95 mg/l of Ca2+ as milligrams per liter of CaCO3.
2. Express 221 mg/l of Ca(HCO3)2 as equivalents per liter of CaCO3.
3. Determine the concentration of the following ions at equilibrium with the solid at 25 degrees C.
a. Cr3+ + 3OH- >>>Cr(OH)3, Ksp = 6 x 10-31
b. CA2+ + 2 OH- >>>Ca(OH)2, Ksp = 8 x 10 -6
4. A 100-ml sample of water is titrated with 0.02 N H2SO4. The initial pH is 9.5 and 6.2 ml of acid is required to reach the pH 8.3 endpoint. An additional 9.8 ml of the acid is required to bring the sample to the pH 4.5 endpoint. Identify the species of alkalinity present and determine the concentration (mg/l) of each expressed as mg/L as CaCO3.
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Q. What is Alloys? Metals have a property of combining with other metals to form alloys. An alloy may be defined as a solid which is formed by a combination of two or more met
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Aufbau principle is obeyed in which of the following electronic configurations: (1) 1s 2 2s 2 2p 6 (2) 1s 2 3p 6 3s 2 (3) 1s 2 3s 2 3p 6
Nylon (polyamides): S ynthetic fibre forming polyamides are also termed as Nylons. Therefore, Nylon is well known in the textiles. Nylons are those polymers which contains a repeat
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Uses of Benzene - Hydrocarbon (1) In dry cleaning (2) As a motor fuel when mixed with petrol. (3) As a solvent. (4) In the manufacture of gammexane (As insecticide).
It can be because these group tend to decrease the electron density when attached to a benzene or other ring structure preferentially at ortho and pera position.
Three-center bonding Example of where the 2c bonding picture is not present is in diborane B2H6. The terminal B-H bonds can be defined in simple 2c terms, but the number of
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