Equilibrium questions
1777 published questions with worked solutions.
- The solubility product of AgCl is 4 10^ -10 . The solubility of AgCl in 0.04 M CaCl_2 is m 10^ -n in scientific notation. What is...
- K_ sp of Cr(OH)_3 is 8 10^ -31 and [Cr^ 3+ ]=0.1 mol/L. Up to what pH must a solution containing a precipitate of Cr(OH)_3 be...
- The degree of hydrolysis of a salt of weak base and weak acid in its 0.01 M solution is 40%. What will be the percentage...
- What is the pH of a solution containing 0.1 M H_3BO_3 and 0.19 M NaH_2BO_3? K_1 of H_3BO_3 = 7.6 10^ -10 .
- The pK_a of acetic acid and pK_b of ammonium hydroxide are 4.8 each. What is the pH value of ammonium acetate solution?
- 0.1 M HCl, 0.1 M H_2SO_4 and 0.1 M NaCl; each of volume 2 mL, are mixed. What will be the pH of the resulting mixture?
- How many grams of Ca(OH)_2 must be dissolved in water to make 2.50 L of solution with pH of 10.65?
- What is the pH of a solution containing 0.6 M HCO_3^- and 0.3 M CO_3^ 2- ? K_ a_1 (H_2CO_3)=4 10^ -7 ; K_ a_2 (HCO_3^-)=4 10^ -11...
- What will be the pH of the resulting solution when 50 mL of 0.2 M NaOH is added to 40 mL of 0.5 M CH_3COOH? K_a of CH_3COOH = 2...
- A weak acid of dissociation constant 10^ -4 is being titrated with KOH (aq.) solution. What is the value of pH at the point of...
- 10^ -3 mole of HCl is added to a buffer solution (1 L) made up of 0.01 M CH_3COOH (pK_a=4.75) and 0.01 M CH_3COONa. What will be...
- pH of blood remains at 7.4 by interchanging of H_2PO_4^- and HPO_4^ 2- ions. pK_a of H_2PO_4^- is 7.10. The ratio of [H_2PO_4^-]...
- A buffer solution of pOH=4.25 is prepared from 1 M NH_3 and 1 M NH_4Cl solution. What is the value (in mL) of NH_4Cl in one litre...
- Bromothymol blue is an indicator with a K_a value of 4 10^ -5 . At pH of 5, what percentage of it is in its basic form?
- 20 mL of a weak monobasic acid requires 20 mL of 0.2 M NaOH for complete titration. Upon addition of 10 mL of this basic solution...
- An acid-base indicator has K_ HIn value of 1.2 10^ -3 . The acid form of this indicator is red and the basic form is blue. The...
- If the equilibrium constant of the reaction 2XY(g) X_2(g)+Y_2(g) is 0.4 at 300 K, the equilibrium constant of the reaction...
- pH of a solution is 5. The OH^- concentration of the solution is 10^ -y M. What is the value of y?
- What is the pH of the resulting solution when equal volumes of 0.1 M NaOH and 0.01 M HCl are mixed? [Given: _ 10 (45)=1.6532]
- The solubility product (K_ sp ) of the sparingly soluble salt (MX) at 298 K is 2.50 10^ -9 . The solubility of the salt at this...
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