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The pOH of a basic solution is 4.85. What is [OH⁻] in M?
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- One half liter (500. mL) of 2.50 M HCl is mixed with 250. mL of 3.75 M HCl. Assuming the total solution volume after mixing is 750. mL, what is the concentration of hydrochloric acid in the resulting solution? What is its pH?3.85 The particulate drawing shown represents an aqueous so- lution of an acid HA, where A might represent an atom or group of atoms. Is HA a strong acid or a weak acid? Explain how you can tell from the picture.If one mole of the following compounds were each placed into separate beakers containing the same amount of water, rank the Cl(aq) concentrations from highest to lowest (some may be equivalent): KCl, AlCl3, PbCl2, NaCl, HCl, NH3, KOH, and HCN.
- Sodium bicarbonate, NaHCO3, is used in baking powder formulations and in the manufacture of plastics and ceramics, among other things. If 26.3 g of the compound is dissolved in enough water to make 200. mL of solution, what is the concentration of NaHCO3? What are the concentrations of the ions in solution?How many mL of 0.25 M HCl(aq) are needed to neutralize a 116.5 mL solution of 0.1 M Ba(OH)2?A particular drain cleaner contains NaOH. What is the value of [OH–] in a solution produced when 5.00 g of NaOH dissolves in enough water to make 275 mL of solution?
- Which reaction is an example of a neutralization reaction? a) N2 (g) + 3H2(g) ---> 2NH3(g) b) Cl2(g) + 2NaBr (aq) ---> Br(/) +2NaCl (aq) c) H2CO3(aq) ---> CO2(g) + H2O(/) d) NaOH(aq) +HCl (aq) ---> NaCl (aq) +H2O(/)The formula for the conjugate acid of HPO42- is? A student weighs out a 2.33 g sample of sodium fluoride, transfers it to a 300 mL volumetric flask, adds enough water to dissolve it and then adds water to the 300 mL tic mark. What is the molarity of NaF in the resulting solution? A student wants to prepare a solution of iron(III) fluoride with a known molarity.How many grams of FeF3 must be weighed out to prepare 250. mL of a 0.245 M aqueous solution of the salt? An aqueous solution has a hydroxide ion concentration of 1.0 x 10^-10 M. What is the hydronium ion concentration in this solution? Concentration = M Is this solution acidic, basic or neutral? An aqueous solution has a hydrogen ion concentration of 1.0 x 10^-6 M. What is the hydroxide ion concentration in this solution? Concentration = M Is this solution acidic, basic or neutral?How many mL of 0.15 M HCl(aq) are needed to neutralize an 81 mL solution of 0.6 M NaOH?
- If a 20.0 mL sample of a weak monoprotic acid is effectively neutralized by 11.65 mL of 0.264 M of standardized NaOH, then what is the strength of the weak acid (in M)?Hydroiodic acid often is used to disinfect and sanitize medical tools and products. In an experiment, 5.0 mL of 0.75 mol/L HI(aq) is mixed with 20.0 mL of distilled water. (record only your final answer with the correct number of significant digits and the proper units.) 1. What is the hydronium ion concentration of the resulting diluted solution? 2. What is the pH of the resulting solution? 3. If 1.0 mL of the diluted solution is added to 9.0 mL of distilled water, what is the resulting pH of the solution? 4. If 1.0 mL of the diluted solution from #3 is added to 9.0 mL of distilled water, you should be able to predict the pH based on the trend you see and without doing any calculations. This is because every time the hydronium concentration a) increases b)decreases by a factor of 10, the pH goes up one full unit since the solution becomes a)more b)less acidic.When 14.08 mL of 0.1594 M NaOH is added to 25.00 mL of 0.1235 M HX (an unknown weak acid), the resulting pH is 4.7. What is the Kaof the unknown acid?
