A beaker of 175 ml Of 0.950 M NaCI left uncovered for a period. If, by the e time period, the volume of solution in the beaker has decreased to 137 ml (th loss is due to water evaporation) What is the resulting concentration of the so a.)1.21 M b) 12.1 M c) 1.44 M d) 1.21 M

A weak base has a Kb = 1.5 x 109. What is the value of the pKa for the conjugate acid? Enter your answer, rounded to the correct number of significant figures, into the box below. Do not use scientific notation. If your answer is a decimal, please include a 0 before the decimal point. pka = type your answer...

Which of the following compounds is a salt? Group of answer choices H2SO4 KNO3 C6H12O6 NaOH HBr

If the pOH of a solution is 11.6 the [H+] would be _______ M.   You only need to put a number in the blank, the units are written in for you. Please given the answer in 3 significant figures and do NOT use scientific notation.

determine the pH of 3.85x10^-2 M sodium phosphate. If the 5% approximation is valid, use the assumption to compute pH.

Calculate the pH of 1.00 L of the buffer Part 1 of 3 Note: Reference the pK of acids at 25 °C table for additional information. a 4.68 pH of starting buffer: Round your answer to 2 decimal places. Part 2 of 3 x10 3.48 X 0.92 M CH,COONa 1.10 M CH3COOH before and after the addition of the following species. (Assume there is no change in volume.) Ś x10 pH after addition of 0.055 mol NaOH: Round your answer to 2 decimal places. olo Ar 181

The concentration of H+ in a glass of milk is around 3.2 x 10-7 The pH must then be around (Round to the 2nd decimal)

Indicate the concentration of each ion or molecule present in the following solutions. Part A 0.50 M NaNO3 Express your answer numerically using two significant figures. If there is more than one answer, separate them by a comma. ΜΕ ΑΣΦ Submit Request Answer Part B 1 ? M 2.3x10-2 M MgSO4 Express your answer numerically using two significant figures. If there is more than one answer, separate them by a comma. ΜΕ ΑΣΦ Submit Request Answer Part C M 4.00x10-2 M C6H12O6 Express your answer numerically using three significant figures. If there is more than one answer, separate them by a comma. ΜΕ ΑΣΦ 1 ? M LG 512

What are the coefficients of NH3 and H2O?___ Al + ___ NO3- + ___ OH- + ___ H2O→ ___ Al(OH)4- + ___ NH3 Group of answer choices 3, 12 4, 18 2,12 3, 14 3, 18

2. HPO42taq) + H2Ou) = H2PO4°(aq) + OH 3. CH3COOH(aq) + H2O) = CH3COOH2*(aq) + OH(aq)