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An amphoteric salt is one that encloses an anion that can act as either an acid or a base in water. Baking soda, NaHCO3 is an example. By combining the ionization as well as hydrolysis reactions of the anion, we acquire the principle reaction that occurs when this salt is dissolved in water. 2HCO3- --->CO3 2- +H2CO3 the ph for such a solution is pka1+pka2/2 Compute the pH of NaHCO3 solution
Why is it quantitatively not acceptable to titrate each vinegar samples with NaOH titrant to the same dark pink endpoint
What volume of 0.22 M FeCl3 (mL) should be diluted to 440 mL to make a solution containing .017 M Cl-
The acid-dissociation constant for an acid-base indicator HIn is 0.0000438. At 600 nm, the molar absorptivities are 2230 for HIn and 8900 for In-. Calculate the absorbance at 600 nm of a 1.00 x 10-4 M solution of the indicator at pH 4.81 in a 1.00..
despite its name, is at least mildly toxic. The properly balanced mixture reacts to form K2CO3, N2, H2O and CO2. Write the balanced reaction and determine the mass of kno3 that should be mixed with 1.4 g of sugar to produce optimally balanced rock..
Explain how would you make 100mL of a carbonic acid buffer at 0.2 M as well as pH = 9.8 using 0.5 M HCO3 and either 0.1 M NaOH or 0.1 M HCl and water
STP corresponded to conditions of "standard" temperature (T=0°C) and standard pressure (p= 1 atm). At STP, 1 L of Br2 reacts totally with 3 L of F2 to form 2 L of a product. What is the formula of the product?
An aqueous solution of KNO3 has a molal concentration of 1.099 mol kg-1. Its density is 1.0630 g mL-1. Calculate the molar concentration of KNO3.
A scuba divers tank contains 0.29kg of O2 compressed into a volume of 2.3L. Calculate the gas pressure inside the tank at 9 degrees C
What molarity of aqueous magnesium chloride solution can be expected to show the same conductivity as 0.0075 M aluminum sulfate at 15,000 units.
Under what conditions can an electron be boosted to a higher energy level, i.e. to an electron shell further from the nucleus. What could happen to this excited electron
given that, for H2C2O4(aq), Ka1 = 6.5 x 10-2 and Ka2 = 6.1 x 10-5. Don't forget that Kw = 1 x 10-14.
The compound SiO2 does not exist as a discrete molecule while CO2 does. this can be explained because: a) the Si-O bond is unstable
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