Define pH. What is the pH of a 0.001 M NaOM solution? What is the conjugate bate

Question

Define pH. What is the pH of a 0.001 M NaOM solution? What is the conjugate bate of H_2PO_4? The conjugate base of a weak ted forms a bas solution when dissolved in water Write the chemical equation responsible for this phenomenon Nomenclature Provide the name or formula, as appropriate, for the following ions Be sure to charge. For the reaction If s_2O_4 IS being consumed at a rate of 0 17 molMi what m re rale of I consumption? The thermal decomposition of phospume (PH_3) to phosphorous and hydrogen is a Arst order reaction with a half life of 35 s at high temperature 2 moles of PH, are placed in a reaction vessel and heated to a high temperature. How long will c take for 90% of the PH_3 to react?

Explanation / Answer

pH meaning is power of Hydronium ion concentration and it is defined as

pH = - log[H^+]

the given one is base so pOH = -log[OH-]

pOH = -log(0.001)

pOH = 3

so pH = 14 - pOH

pH = 14 - 3 = 11

H2PO4- <-------> H+ + HPO42-

acid                                 conjugate base

CH3COOH + H2O ---------> CH3COO- + H3O+

acid                                      conjugate base

Bromide Br-

Hypochlorite ClO-

Nitrate NO3-

iron (II) Fe+2

Sodium Na

ClO4- Perchlorate ion

S2- Sulphide ion

MnO4- Permanganate ion

F- Fluoride ion

Cr2O7 2-   Dichromate ion

one mole of S2O8-2 requires 3 moles of I-

hence 0.17 moles of S2O8 2- requires 0.17 * 3 = 0.51 moles/min

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