Answer:
Yes. u can because its easy to tell if an item will sink or float usually by the weight or the width
Explanation:
Answer:
Like most Earth materials, rocks are created and destroyed in cycles. The rock cycle is a model that describes the formation, breakdown, and reformation of a rock as a result of sedimentary, igneous, and metamorphic processes. All igneous rocks start out as melted rock, (magma) and then crystallize, or freeze.
<u>Answer:</u> The concentration of acetic acid in the vinegar is ![7.10\times 10^{-2}M](https://tex.z-dn.net/?f=7.10%5Ctimes%2010%5E%7B-2%7DM)
<u>Explanation:</u>
To calculate the pH of the solution, we use the equation:
![pH=-\log[H^+]](https://tex.z-dn.net/?f=pH%3D-%5Clog%5BH%5E%2B%5D)
We are given:
pH = 2.95
Putting values in above equation, we get:
![2.95=-\log[H^+]](https://tex.z-dn.net/?f=2.95%3D-%5Clog%5BH%5E%2B%5D)
![[H^+]=1.122\times 10^{-3}M](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%3D1.122%5Ctimes%2010%5E%7B-3%7DM)
The chemical equation for the ionization of acetic acid follows:
![CH_3COOH\rightleftharpoons H^++CH_3COO^-](https://tex.z-dn.net/?f=CH_3COOH%5Crightleftharpoons%20H%5E%2B%2BCH_3COO%5E-)
The expression of
for above equation follows:
![K_a=\frac{[H^+][CH_3COO^-]}{[CH_3COOH]}](https://tex.z-dn.net/?f=K_a%3D%5Cfrac%7B%5BH%5E%2B%5D%5BCH_3COO%5E-%5D%7D%7B%5BCH_3COOH%5D%7D)
We are given:
![K_a=1.8\times 10^{-5}](https://tex.z-dn.net/?f=K_a%3D1.8%5Ctimes%2010%5E%7B-5%7D)
![[H^+]_{eq}=[CH_3COO^-]_{eq}=1.122\times 10^{-3}M](https://tex.z-dn.net/?f=%5BH%5E%2B%5D_%7Beq%7D%3D%5BCH_3COO%5E-%5D_%7Beq%7D%3D1.122%5Ctimes%2010%5E%7B-3%7DM)
Putting values in above expression, we get:
![1.8\times 10^{-5}=\frac{(1.122\times 10^{-3})\times (1.122\times 10^{-3})}{[CH_3COOH]}](https://tex.z-dn.net/?f=1.8%5Ctimes%2010%5E%7B-5%7D%3D%5Cfrac%7B%281.122%5Ctimes%2010%5E%7B-3%7D%29%5Ctimes%20%281.122%5Ctimes%2010%5E%7B-3%7D%29%7D%7B%5BCH_3COOH%5D%7D)
![[CH_3COOH]_{eq}=0.0699M](https://tex.z-dn.net/?f=%5BCH_3COOH%5D_%7Beq%7D%3D0.0699M)
So, the concentration of acetic acid = ![[CH_3COOH]_{eq}+[H^+]_{eq}=(0.0699+0.001122)=7.10\times 10^{-2}M](https://tex.z-dn.net/?f=%5BCH_3COOH%5D_%7Beq%7D%2B%5BH%5E%2B%5D_%7Beq%7D%3D%280.0699%2B0.001122%29%3D7.10%5Ctimes%2010%5E%7B-2%7DM)
Hence, the concentration of acetic acid in the vinegar is ![7.10\times 10^{-2}M](https://tex.z-dn.net/?f=7.10%5Ctimes%2010%5E%7B-2%7DM)
Answer:
A strong acid will react with a weak base to form an acidic (pH < 7) solution. It depends of the products such as hydrochloric acid, HCl, with sodium hydroxide, NaOH, solutions produces a solution of sodium chloride, NaCl, and some additional water molecules.
Explanation: hope this helps
In bleaching a stain, you see that the stain fades, and doesn't come back, which indicates that it has undergone a change.
Buring a match, you would see the ashes, and that it cannot be it's original substance again.
In rusting of an iron nail, the nail cannot be unrusted easily, which indicates that it has been through a chemical reaction.