The concentration of hydronium ion in a sample is 3.5 x 10-7 mol/L. What is the pH of the above solution? The question should be answered to the proper number of significant digits.

The amount of nitrogen in an organic substance can be determined by an analytical method called the Kjeldahl method, in which all the nitrogen in the organic substance is converted to ammonia. The ammonia, which is a weak base, can be neutralized with hydrochloric acid, as described by the equation NH, (aq) + HCl(aq) → NH₂Cl(aq) If 46.0 mL of 0.150 M HCl(aq) is needed to neutralize all the NH, (g) from a 2.25 g sample of organic material, calculate the mass percentage of nitrogen in the sample. mass percentage:

0.261 g of potassium hydrogen phthalate (KHP) was titrated with NaOH. When 16.8 mL of the NaOH had been added to the acid, the indicator (phenolphthalein), changed color.  What is the concentration of the NaOH solution? The molar mass of KHP is 204 g/mol. Enter your answer with three decimal places. Example: 0.544

An analytical chemist weighs out 0.193 g of an unknown diprotic acid into a 250 mL volumetric flask and dilutes to the mark with distilled water. She then titrates this solution with 0.1200 M NaOH solution. When the titration reaches the equivalence point, the chemist finds she has added 24.0 mL of NaOH solution. Calculate the molar mass of the unknown acid. Be sure your answer has the correct number of significant digits. g mol x10 X Ś

CHEMICAL REACTIONS Determining the volume of base needed to titrate a given mass... A chemistry student weighs out 0.0878 g of phosphoric acid (H₂PO4), a triprotic acid, into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1500 M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the final equivalence point. Round your answer to 3 significant digits. Explanation Check X MacBook Air 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center

An analytical chemist weighs out 0.182 g of an unknown triprotic acid into a 250 mL volumetric flask and dilutes to the mark with distilled water. She then titrates this solution with 0.0600 M NaOH solution. When the titration reaches the equivalence point, the chemist finds she has added 47.4 mL of NaOH solution. Calculate the molar mass of the unknown acid. Round your answer to 3 significant digits. 0 mol x10 X S

The amount of nitrogen in an organic substance can be determined by an analytical method called the Kjeldahl method, in which all the nitrogen in the organic substance is converted to ammonia. The ammonia, which is a weak base, can be neutralized with hydrochloric acid, as described by the equation NH3(aq) + HCl(aq) ->> NH₂Cl(aq) If 6.0 mL of 0.150 M HCl(aq) is needed to neutralize all the NH3(g) from a 2.25 g sample of organic material, calculate the mass percentage of nitrogen in the sample.

A chemistry student weighs out 0.212 g of lactic acid (HC,H,03) into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1000 M NaOH solution. Calculate the volume of NaOH solution the student will need to add to reach the equivalence point. Round your answer to 3 significant digits. mL ola Ox10 Ar ?

By titration it is found that 28.7 milliliters of 0.155 M NaOH(aq) are required to neutralize 25.0 mL of HCl(aq). Calculate the concentration of hydrochloric acid solution, in units of mol·L-1. Answer with the correct number of significant figures.

What is the pH of (3.21x10^-1) M C5H5NHBR? Enter your answer in scientific notation with 3 sig figs. Do not include any units in your answer. Do not round any intermediate calculations. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: х10 Answer