Why does a substance with a endothermic heat of solution dissolve (for example Sodium acetate trihydrate)
Describe how to prepare 100mL of 0.150 acetate buffer at pH=5 from sodium acetate trihydrate and 0.200M HCl
(c) (Challenging). 1.3608 g of sodium acetate trihydrate solid C2H3NaO2●3H2O (NaAc●3H2O, MM = 136.08 g/mol) was fully dissolved in 100.0 mL of pure water. What was the pH of this solution?
Calculate the mass of solid sodium acetate trihydrate, NaC2H3O2. ⋅ 3H2O, required to mix with 100.0 mL of 1.0 M acetic acid to prepare a pH 4 buffer. The Ka of acetic acid is 1.8 × 10–5
Table 1. Sodium Acetate Solution Data Mass of Sodium Acetate (g) Volume of Sodium Acetate (mL) Concentration of Sodium Acetate Solution (M) 4 100 ?? Show your work for the calculation of the concentration (in molarity) the sodium acetate solution in Table 1 (in Question 2 above). Include units. NOTE: The molar mass of sodium acetate is 82.0343 g/mol.
Table 3: Sodium Acetate Data Sodium Acetate (g) Molarity of Sodium Acetate (Step 7) 4.0 g 0.4876 M Table 4: Buffer Solutions and pH Readings for Beakers A, B, C, D, and E Buffer mL of Acetic Acid mL of Sodium Acetate pH measured A 5 5 4.3 B 5 1 3.6 C 10 1 3.4 D 1 10 5.3 E 1 5 5.0 Post-Lab Questions What are the calculated pH values for the buffers (A,B,C,D and E) that you...
If an endothermic reaction absorbs heat, then why does it feel cold to the touch?Match the words in the left column to the appropriate blanks in the sentence on the right.An endothermic reaction feels cold to the touch because the reaction (acting here as the system) absorbs heat from the surroundings. When you touch the vessel in which the reaction occurs, you, being part of the surroundings, lose heat to the system (the reaction), which makes you feel cold. The...
Consider a 1L, 200mm acetate buffer with pH = 6.0 and with a pKa of 4.73 C) What weight in grams of Sodium Acetate is needed to make this solution? MW Sodium Acetate = 136.08 g/mole > Ratio of ( x ) = 18.62 Instructor's Notes (9/6/19): If you were wondering why this sodium acetate has a higher MW than standard Sodium Acetate, it's because its Sodium Acetate Trihydrate as opposed to anhydrous Sodium Acetatel Take a moment to solve...
Why does salt dissolve in water? A. The positive charges of sodium (Na) and the negative charges of chloride (Cl) interact with water molecules B. The NaCl molecules form covalent bonds with the surrounding water molecules C. The water molecules are attracted to the nonpolar bonds of the sodium and chloride ions D. The ionic bond between the sodium ion and chloride ion is strong E. None of the above
Lead(II) acetate + sodium hydroxide solution Lead(II) acetate + aqueous ammonia solution Cobalt(II) nitrate solution + sodium carbonate solution Cobalt(II) nitrate solution + Sulphuric acid solution Cobalt(II) nitrate solution + aqueous ammonia solution Ammonium acetate solution + sodium hydroxide solution
The maximum amount of chromium(III) phosphate that will dissolve in a 0.255 M sodium phosphate solution is _____ The molar solubility of calcium fluoride in a 0.202 M calcium acetate solution is _______