In an acid-base titration, the neutralization of 20.00 mL of a solution of KOH (potassium hydroxide) of unknown concentration required the addition of 21.50 mL of 0.1532 M HNO3 (nitric acid). Calculate the molarity of the potassium hydroxide solution. Place your answer in the box. Express your answer using only a number or numbers without text. Report your result in decimal notation and to the proper number of significant figures. All numbers are measured.

An analytical chemist weighs out 0.087 g of an unknown monoprotic acid into a 250 mL volumetric flask and dilutes to the mark with distilled water. She then titrates this solution with 0.1700 M NaOH solution. When the titration reaches the equivalence point, the chemist finds she has added 5.4 mL of NaOH solution. Calculate the molar mass of the unknown acid. Round your answer to 2 significant digits.

You perform a titration between Sodium hydroxide (NaOH) and Carbonic Acid (H₂CO3). The NaOH is in the burette and the H₂CO3 is in the Erlenmeyer Flask. 42.5 mL of 0.50 M NaOH was added to 25.6 mL of H₂CO3, what is the concentration of the H₂CO3? Give your answer to 2 decimal places..

0.644 g of wood bleach, which contains oxalic acid, H2C2O4, was placed in an Erlenmeyer flask.  The wood bleach was titrated with 23.57 mL of 0.379 M KOH solution.  Determine the percent by mass of the H2C2O4 (a diprotic acid) in the sample of wood bleach. Enter your answer with the correct number of significant figures.  If you do not enter the correct number of significant figures, your answer may be graded as incorrect even if it is otherwise correct.

Titration of a 11.0 mLmL solution of HClHCl requires 32.4 mLmL of 0.11 MM NaOHNaOH. What is the molarity of the HClHCl solution? Express your answer using two significant figures.

If 25.00 mL of 3.00 M HCl(aq) is diluted with water to a volume of 750.0 mL, what is the molarity of the diluted HCl(aq)? Don't write the units of measure (M=mol/L) in the box; only the numerical value of the answer, using the standard notation.

Calculate the molar mass of the unknown acid. Be sure your answer has the correct number of significant digits.

A chemist prepares a solution of vanadiumIII bromide VBr3 by measuring out 0.50g of VBr3 into a 50.mL volumetric flask and filling to the mark with distilled water. Calculate the molarity of Br− anions in the chemist's solution. Be sure your answer is rounded to 2 significant digits.

An analytical chemist weighs out 0.091 g of an unknown triprotic acid into a 250 mL volumetric flask and dilutes to the mark with distilled water. He then titrates this solution with 0.1200M NaOH solution. When the titration reaches the equivalence point, the chemist finds he has added 23.2 mL of NaOH solution. Calculate the molar mass of the unknown acid. Round your answer to 2 significant digits. mol ?

Sodium carbonate dissociates when it dissolves in water as follows:   If the concentration of the sodium ions is 0.817 mol/L, then what is the concentration of the sodium carbonate solution? Record only your numerical answer with the correct number of significant digits.  You do not need to include units as the units appear for you beside the answer box already.