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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.
Q. Define Conjugate acid-base pair and buffer? Buffers are substances that resist changes in pH. To "balance pH" means to buffer. Weak acids and bases make good buffers.
what is the molecular geometry of IF4+
defination and examples
Rice bran Rice bran contains primarily insoluble fiber (cellulose) and soluble fiber (hemicellulose). Insoluble fiber adds bulk to the gastrointestinal (GI) track in humans cau
Explain the steps involved in the preparation of either potassium dichromate from sodium chromate or potassium permanganate from manganese dioxide.
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Q. Composition of the nucleus Since the time of Rutherford, other scientists have learned a significant amount about the fundamental properties about the nucleus of an atom. In
H+
1. Consider a platinum crystal structure (FCC, R Pt = .139 nm). a. Sketch the (100), (110), and (111) planes (including the atoms in the second layer if they can be observed
Briefly tell me about chemical combination and its laws
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