Define mean life of radioactive atoms. Suppose a buffer solution contains Z moles of NaOH and 0.025 moles of its salt. The pH of the solution is about 9.034 if the dissociation constant is 1.8 ✕ 10^-5, then calculate the value of Z.

Q: Periodic acid, HIO4, is an important oxidizing agent and a moderately strong acid. In a 0.10 M…

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Q: What is the pH when 25% of the acid H3AsO4 (pKa = 2.22) has reacted with NaOH in a titration?

A: The reaction of H3AsO4 with NaOH results in the conversion of 25% of the acid into its conjugate…

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Q: A buffer system is set up with [HA] = 2[A–]. If pKa = 5.5, what is the pH of the buffer?

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Q: equilibrium reactions and equations

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Q: Baking powder contains sodium bicarbonate plus an acidic salt like sodium acid tartrate or calcium…

A: Please find your solution below : Baking powder is a mixture of sodium bicarbonate (NaHCO3), other…

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A: Given, Mass of Fe3+ = 5.585 g Fe3+ reduced in the reaction Fe3+ + V2+ → Fe2+ + V3+ Here we are asked…

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A: coordination complex :a compound which does not losses it's identity when dissolved in aqueous…

Q: How does hydrocholoric acid and sodium chloride isolate barium-137 from cesium source?

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Q: What is the pH of a solution containing 0.327 mol L-1 of HCl and 1.041 mol L-1 of a weak acid with…

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Q: Zinc is more active than cobalt and iron but less active than aluminum. Cobalt is more active than…

A: The correct option is provided in the next step:

Q: A buffer solution containing 0.19 M methylammonium and 0.22 M of the conjugate base, methylamine,…

A: Answer: option c. 10.70 is the pH of the buffer solution

Q: Which acid is the best choice to create a buffer with pH=7.38? %3D nitrous acid (HNO2), pKa = 3.34 O…

A: to choose the best buffer, pick out that weak acid whose pKa is close to the pH of the buffer.

Q: Neutralization of phosphate . Given that phosphoricacid (H3PO4) can give up three protons with…

A: Titration curve for H3PO4 versus NaOH

Q: A mix of two oxides of two different elements located in the third period melts in water forming an…

A: We know buffer solution is the solution of weak acid with conjugate base or weak base with conjugate…

Q: What are interionic interaction?

A: Interionic interactions:When an ion is surrounded by an ionic atmosphere which has a net opposite…

Q: 18 13 14 15 16 17 He Li Be B. Ne No Mg Al Si P. K Ca Ga Ge As Se Br CI Ar K Kr

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Is potassium acetate, KC2H3O2, an acidic or basic salt and why?

A: Potassium acetate:

Q: Calculate the PH and the POH FOR a solution that is ISM IN Hellz and .04M IN HALO₂, Heloz K; FOR…

A: HClO3(aq) is a strong acid, whereas HClO2(aq) is a weak acid with Ka = 1.1*10-2  Given [HClO3(aq)] =…

Q: Considering that the Redfield ratio for algae is C:N:P = 106:16:1, what would be the limiting…

A: Given  ( Red field ratio for algae is C:N:P = 106:16:1 ) Mass concentrations of C= 20 mg/L =…

Q: both sentences are true, (B) if both sentences are false, (C) if the first sentence is true but the…

A: Concept is based on iodometric titration:    As per our guideline we have to answer first question…

Q: For the Buffers experiment, your group was tasked to prepare a 250.0 ml, 0.20 M pH 3.00 buffer from…

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Q: Why do indicator color changes occur near pKHIn +- 1?

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Q: Discuss other medical applications on the use of EDTA to treat poisonings by radioactive materials…

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Q: How is Compound 24 . manufactured?

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Q: When Ca metal is placed in an aqueous solution of NaCl, the calcium slowly disappears and bubbles…

A: The activity of a metal depends on the electropositive nature of it. More the electropositive metal,…

Q: Find the pH of a 0.381 M aqueous solution of hypobromous acid (HOBr), for which Ka = 2.1 * 10-⁹.…

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Q: Given 0.75 M solutions of acetic acid (pKa = 4.76) and sodium acetate, what is the ratio of…

A: Given: PKa of acid = 4.76 pH of solution = 6.3

Q: Explain the relative activity of a metal.

A: Metals have electropositive nature and are placed on the left corner of the periodic table. On…

Q: Carbonic acid, H2CO3, undergoes the following acid base equilibria: H2CO3,=H*(aq) + HCO;¯(aq) =…

A: The relation between pKa and pH can be known as, ph = pKa + logsaltacid

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Q: Although KOH, RÜOH, and CSOH have little association between metal and hydroxide in aqueous…

A: To calculate the fraction of lithium in the form LiOH(aq) at equilibrium in 1.00 F LiOH solution.

Q: What substance is present if the iodine test gives a dark blue color change

A: Iodine test involves using reagent called Lugol's iodine, which is aqueous solution of element…

Q: Determine the pH of a 10-3 mol/L solution of (a) hydrogen sulfate ion (pKa = 1.99), (b) formic acid…

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Q: Iodine (I,) reacts with thiosulfate (S,0;-). 2 S,03 (aq) + L, (aq) =21-(aq) + S,0 (aq) If the…

A: Balanced Reaction 2 S2O32- (aq) + I2(aq) --> 2I-(aq) + S4O62- (aq) Thiosulfate solution reacts…

Q: what is the chemical formula created when gallium (31) bonds with sulfur (16)

A: The given elements are gallium and sulfur. The atomic number of gallium is 31 and sulfur is 16.

Q: The following reaction is used for the analytical determination of uranium in acidic solution:  UO2+…

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Q: Buffer preparation: 18. Using a volumetric pipette, dispense 20.0 mL of a 0.10 M potassium…

A: The constituents of the buffer solution are H2PO4-(aq) as the acid and HPO42-(aq) as the conjugate…

Q: The amino acid serine has two pKa values, one for its carbonyl group (pKa = 2.21) and one for its…

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Q: Calculate the free energy per mole of completed reaction for the Na-Ca exchanger that has a…

A: Given, Na-Ca exchanger

Q: You can fit 25 drops of substance X on a penny and 12 drops of substance Y on a different penny.…

A: More the number of Penny's means they are stick to each other. Hence, stronger the intermolecular…