Phosphoric acid or orthophosphoric acid (H₃PO₄) is triprotic acid, which means it lose three protons in chemical reaction (in reaction of esterification with alcohol) and sulfuric acid (H₂SO₄) is diprotic acid, which means it lost two protons in chemical reaction and does not have enough palce to bind alcohol.
Sample Response:<span> The brain, through the nervous system, sends signals to the muscular system, causing the muscles to move rapidly. This rapid motion produces heat in the body and is observed as shivering. The brain also sends signals to the muscles right beneath the skin. These muscles shorten and tighten, causing the hairs on the skin to stand up. When the hairs stand up, heat is kept in the air trapped within the hairs, which keeps the body warm.</span>
Answer:
w/v% = gm per 100 ml
75gm X gm 7500
------- = ------ == --------
1500ml 100ml 1500X
X=5%
Answer:
250mL volumetric flask
Explanation:
A beaker is a cylindrical glass or plastic vessel used for holding liquids. Its principal use is not measuring volumes with accuracy
An erlenmeyer flask is used to mixing or stirring solutions, is not used to measure volumes.
A volumetric flask is a glass instrument used in lab that is <em>calibrated to contain a precise volume at a certain temperature. </em>
That means if you want to make a solution with accuracy you must use a <em>250mL volumetric flask</em>.
I hope it hepls!