Solid potassium hydroxide may be used to unclog sink drains. The dissolution of potassium hydroxide in...
Solid potassium hydroxide may be used to unclog sink drains. The dissolution of potassium hydroxide in water is quite exothermic. What are the signs (Negative, Positive, or Cannot be determined) of ΔHsys and qsurr? Explain your answers.
Homework Answers
Add Answer to:
Solid potassium hydroxide may be used to unclog sink drains. The
dissolution of potassium hydroxide in...
When a 7.82-g sample of solid potassium hydroxide dissolves in 100.0 g of water in a...
When a 7.82-g sample of solid potassium hydroxide dissolves in 100.0 g of water in a coffee-cup calorimeter, the temperature rises from 22.7 °C to 59.2 °C. What is ΔH for the dissolution of KOH in water, as shown below? KOH(s) → K+(aq) + OH−(aq) Assume that all solutions have the same specific heat as water.
When some ionic solids (for example, potassium chloride) are dissolved in room temperature water, the beaker...
When some ionic solids (for example, potassium chloride) are dissolved in room temperature water, the beaker becomes cold. a) Based on this observation, is the enthalpy of dissolution positive, negative or zero? b) Since potassium chloride spontaneously dissolves in water at room temperature, does the entropy of the system increase or decrease as the solid dissolves? Briefly explain your answer. c) Based on your answers to parts a) and b), will potassium chloride become more soluble or less soluble as...
When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be det...
When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 2.99 g of FeBrz(s) are dissolved in 102.70 g of water, the temperature of the solution increases from 25.90 to 29.34 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.59 J/°C....
Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary...
Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the unwieldy formula of KHC8H4O4. This is often written in shorthand notation as KHP. If 37.5 mL of a sodium hydroxide solution are needed to neutralize 2.14 grams of KHP, what is the molarity of the sodium hydroxide solution? __________M Oxalic acid dihydrate is a solid, diprotic acid that can be used in the laboratory as a primary standard. Its formula...
1a. Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a...
1a. Potassium hydrogen phthalate is a solid,
monoprotic acid frequently used in the laboratory as a
primary standard. It has the unwieldy formula of
KHC8H4O4. This is
often written in shorthand notation as KHP.
If 21.1 mL of a barium hydroxide
solution are needed to neutralize 1.59 grams of
KHP, what is the molarity of the barium hydroxide
solution?
1bThe concentration of Sn2+ in a
solution is determined by titrating it with a
0.1053 M Ce4+
solution. The balanced net...
step 2) trial #1 mass of solid standard (KHP, potassium hydrogen phthalate) used = 0.100g; trial...
step 2) trial #1 mass of solid standard (KHP, potassium hydrogen phthalate) used = 0.100g; trial 1 equivalence point = 35.32 mL step 5) mass of unknown (mixture of KHP and NaOH) = 1.5389g; trial #1 equivalence point = 10.50 mL find requested weight percent What happens in step 2) Use a convenient size flask and prepare an aqueous solution containing a known mass of KHP that will react with an estimated 25 mL of the unstandardized NaOH solution. (the...
disregard the answers I put. please answer all parts of the question. 3. In Part A...
disregard the answers I put. please answer all parts of the
question.
3. In Part A you dissolved CaCl2 in water. a. What happened to the temperature? Here we wten we added cache b. That means the calorimeter (circle one) ABSORBED/RELEASED heat. C. As a result, the reaction dissolving the CaCl2 (circle one) ABSORBED RELEASED heat. d. That means that dissolving CaCl2 is (circle one) ENDOTHERMIC/EXOTHERMIC, and e. AH for dissolving CaCl2 will be (circle one) POSITIVE/NEGATIVE. nplete the following...
All of the solutions used today can be washed down the sink with water. Solid waste...
All of the solutions used today can be washed down the sink with water. Solid waste should be thrown in the bin. Experimental This experiment is to be carried out individually NOTE: Failure to follow the correct procedures as explained in Skill 4 will result in wildly inaccurate results. The notes below do NOT give a full description of the techniques. 0 2 Standardisation of 0.1 M sodium hydroxide with the primary standard potassium hydrogenphthalate Part A (Al) In a...
(6) Potassium Hydrogen Phthalate (KHP) is used as a primary standard (to standardize basic solutions) because...
(6) Potassium Hydrogen Phthalate (KHP) is used as a primary standard (to standardize basic solutions) because it is solid and air-stable, making it easy to weigh accurately. It's solubility in water is 80 g/L. Convert this to mols dm. Molar mass of KHP is 204.22 g/mol (7) State the reaction between your acid component in vinegar and sodium hydroxide. What volume of 0.250 NaOH will react exactly with 25.00 cm of the diluted vinegar in problem 4?
(6) Potassium Hydrogen Phthalate (KHP) is used as a primary standard (to standardize basic solutions) because...
(6) Potassium Hydrogen Phthalate (KHP) is used as a primary standard (to standardize basic solutions) because it is solid and air-stable, making it easy to weigh accurately. It's solubility in water is 80 g/L. Convert this to mols dm. Molar mass of KHP is 204.22 g/mol (7) State the reaction between your acid component in vinegar and sodium hydroxide. What volume of 0.250 NaOH will react exactly with 25.00 cm of the diluted vinegar in problem 4?
When a solid dissolves in water, heat may be evolved or absorbed. The heat of dissolution (dissolving) can be determined using a coffee cup calorimeter. In the laboratory a general chemistry student finds that when 2.99 g of FeBrz(s) are dissolved in 102.70 g of water, the temperature of the solution increases from 25.90 to 29.34 °C. The heat capacity of the calorimeter (sometimes referred to as the calorimeter constant) was determined in a separate experiment to be 1.59 J/°C....
disregard the answers I put. please answer all parts of the
question.
3. In Part A you dissolved CaCl2 in water. a. What happened to the temperature? Here we wten we added cache b. That means the calorimeter (circle one) ABSORBED/RELEASED heat. C. As a result, the reaction dissolving the CaCl2 (circle one) ABSORBED RELEASED heat. d. That means that dissolving CaCl2 is (circle one) ENDOTHERMIC/EXOTHERMIC, and e. AH for dissolving CaCl2 will be (circle one) POSITIVE/NEGATIVE. nplete the following...
All of the solutions used today can be washed down the sink with water. Solid waste should be thrown in the bin. Experimental This experiment is to be carried out individually NOTE: Failure to follow the correct procedures as explained in Skill 4 will result in wildly inaccurate results. The notes below do NOT give a full description of the techniques. 0 2 Standardisation of 0.1 M sodium hydroxide with the primary standard potassium hydrogenphthalate Part A (Al) In a...
(6) Potassium Hydrogen Phthalate (KHP) is used as a primary standard (to standardize basic solutions) because it is solid and air-stable, making it easy to weigh accurately. It's solubility in water is 80 g/L. Convert this to mols dm. Molar mass of KHP is 204.22 g/mol (7) State the reaction between your acid component in vinegar and sodium hydroxide. What volume of 0.250 NaOH will react exactly with 25.00 cm of the diluted vinegar in problem 4?
(6) Potassium Hydrogen Phthalate (KHP) is used as a primary standard (to standardize basic solutions) because it is solid and air-stable, making it easy to weigh accurately. It's solubility in water is 80 g/L. Convert this to mols dm. Molar mass of KHP is 204.22 g/mol (7) State the reaction between your acid component in vinegar and sodium hydroxide. What volume of 0.250 NaOH will react exactly with 25.00 cm of the diluted vinegar in problem 4?
Most questions answered within 3 hours.
-
Write the ionic equations for the first stage of salts
hydrolysis.
Anion, Cation?
Na2S
NiSO4
K2SO4...
asked 1 hour ago -
suppose there is a normally distributed population with a mean of
250 and a standard deviation...
asked 1 hour ago -
Question Three
Suppose you as project manager are using the Waterfall
development methodology on a large...
asked 2 hours ago -
Which statement is not true about welfare in Canada?
A.Benefits typically vary based on one's ability...
asked 3 hours ago -
Please help me with FLOWCHART and UML diagram for class,
thank you!
#include <iostream>
#include <fstream>...
asked 4 hours ago -
3. Describe the “logic circuit” of the Lac operon. Which
proteins are bound or not to...
asked 4 hours ago -
Ayesha’s adjusted gross income is $60,000 in 2019. She donated a
piece of artwork with a...
asked 4 hours ago -
For Dijkstra’s shortest path algorithm:
a. Give the Big-O time for Dijkstra’s shortest path algorithm
and...
asked 4 hours ago -
Phosphorus violates the 'octet rule' in biological molecules,
forming more covalent bonds than expected based on...
asked 4 hours ago -
A 1.3 eV electron has a 10-4 probability of tunneling
through a 2.4 eV potential barrier....
asked 4 hours ago -
What is the one ingredient that is common to being successful
with all stakeholders?
profit
trust...
asked 4 hours ago -
Write an assembly language 32 bit program that reads in lines of
text by a .txt...
asked 4 hours ago