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How much heat, in joules and in calories, is required to heat a 28.4-g (1-oz) ice cube from −23.0 °C to −1.0 °C?
A buffer solution is prepared via adding solution A (Sodium dihydrogen phosphate 27.6 gm up to 1000mL distilled water) and solution B (Disodium hydrogen phosphate 5.362gm up to 100mL distilled water). During preparation, 1000 mL buffer is prepared via adding 80mL of solution B to 920mL of solution A. Show a theoretical approach to calculate the pH of the buffer solution.
A one liter buffer solution was made of ammonia (0.33 M)-ammonium chloride (0.33 M) at equilibrium. A student was asked to add 0.05 mol HCl to that solution. However, he mistakenly added 0.07 mol NaOH to that solution. Assume no change in the volume of the buffer. a) What type of buffer solution it was. Provide its mechanism. b) Calculate the change of pH of the buffer after the mistake of the student c) What would be the change of pH if the student adds 1000 mL water to that buffer solution?
identify the amino acids that form the peptide; (2) label the N-
and C- terminal amino acids;(3) name the tripeptide using three-letter symbol
How many equivalents are there per mole of the first reactant in the reaction,
2HCl + Ba(OH)2 −→ BaCl2 + 2H2O ?
ionic compound of CO2
What is the pH of a solution if the hydrogen ion concentration is 3.5 x 10-5 ?
What is the molarity of a HCl solution if it takes 15.6 mL of a 1.00 M NaOH solution to titrate 25.0 mL of the acid to a neutral endpoint?
What is the pOH of a solution if the hydrogen ion concentration is 2.8 x 10-6 ? Is this an acid or a base?
what is V3N4 as a multivalent compound written out as when showing roman numerals?
