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A solution contains Ba2+ (1.0x10^-3) and Ca2+ (1.0x10^-3). Drops of a 5.0x10^-1 M solution NaF were added using a buret until the [F-] in the solution mixture reached 1.5x10^-3 M. SHould a precipitate form? If SO what is the precipitate? Ksp (BaF2) = 1.0x10^-6. (CaF2) Ksp = 5.3 x10^-9 Ignore volume changes.
Magnesium oxide reacts slowly with water to form magnesium hydroxide. What would be the effect on the observed value for ∆H_rxn for the reaction of MgO if 10%
To what general class of mechanisms does the attack of bromide ion, Br-, on the cyclic bromonium ion
Calculate the volume of dry CO2 produced at body temperature (37°C) and 0.966 atm when 26.0 g of glucose is consumed in this reaction.
What is the pH when enough 0.100 base is added to neutralize 8.00 mL of 0.100 M acid? Note: Make simplifying assumptions
What is the boiling point elevation and boiling point of a solution that contains 1.20 moles of non-ionic solute in 800.0 g of H2O?
The iron content of an ore can be determined by a redox titration using K2Cr2O7 as the titrant. A sample of the ore is dissolved in concentrated HCl using Sn2+ to speed its dissolution by reducing Fe3+ to Fe2+.
Calculate the pH of 1.00 L of a buffer that is 0.130 M HNO2 and 0.190 M NaNO2. What is the pH of the same buffer after the addition of 1.00 mL of 12.0 M HCl. (pKa of HNO2 = 3.40)
Elemental exonium (not a real element) consists of two major isotopes Abundance Mass 59% 94 amu 41% 112 amu What is the atomic weight for exonium? Answer in units of amu
State the chemical reaction that took place in the patient's body.
Consider the gas phase reaction 2 HCL = H2 + Cl2 for which Kc = 16 at 523 Kelvin. If .030 moles of HCl is introduced into a 1 L vessel at 523 K
How many grams of potassium chlorate decompose to potassium chloride and 510. mL of O2 at 128°C and 652 torr?
if it took 18.72 (+ and - 0.05) ml of the base to reach the equivalence point. what was the concentration of unknown acid? 2) what is the uncertainity associated with this determination?
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