Calculate the PH of the solution to 2 significant figures  0.021 moldm-3 HCl show all working outs

What 4 primary standards can be used to standardize acid solutions and their balanced reactions with HCL

E University Librarie. E UNIVERSITY POR. Student Detail Sc. Part A The table shows respective color change when a universal indicator is added to the clear solutions. Rank the samples based on increasing order of acid strength. Solutions Color change 0.001 M lactic Light red 0.01 M phenol Light yellow 0.01 M nitrous acid Light orange 0.001 M hydrogen peroxide Light green Rank the solutions by Increasing order of their acid strength. To rank items as equivalent, overlap them. > View Available Hint(s) Reset Help 0.01 Mnitrous acid 0.001 Mlactic acid 0.001 M hydrogen peroxide 0.01 Mphenol Least acidic Most acidic P Pearson Copyright © 2021 Pearson Education Inc. All rights reserved. Terms of Use | Privacy Policy | Permissions | Contact Us | MacBook Air 80 888 DII DD F3 F4 F5 F6 F7 F8 F9 F10 F11 $ & 3 4 7 8. 9. { R Y U 一 F J K く C V B N M + I| .. .- エ ト

What is the concentration of H2SO3 in a 0.15 M NazSOs solution? For SO3²-, Kbi = 6.5 x 10-7 and Kb2 = 7.1 x 10-13. Determine the of pH in a 0.15 Na2S solution. Kbi = very large and Kb2 = 1.1 x 10-7 Please help me with these two problems and show me how you did it, I'm confused about where to start with these problems.