Answer:
Explanation:
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In this case, since the reactions between NaOH and the acids are:
Whereas we can see the 1:1 and 2:1 mole ratios between NaOH and HCl and H2SO4 respectively. In such a way, at the equivalence point we realize that:
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Answer:
0.954M solution
Explanation:
molarity = moles solute / volume solution in liters
=> molarity = 1.67 moles / 1.750 L soln = 0.954M solution
Answer:
0.879 mg
Explanation:
To solve this problem we need to use the definition of ppm:
- ppm = μg solute / g solution
With the above information in mind we can calculate the micrograms of lead using the concentration (13.97 ppm) and mass of solution (62.9 g):
- μg lead = 13.97 ppm * 62.9 g
Finally we convert μg to mg:
- 878.713 μg *
= 0.879 mg of lead
Answer:
These enzymes catalyze the chemical reactions that occur during spoilage. EDTA deactivates these enzymes by removing the metal ions from them and forming stable chelates with them.
Answer:
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Explanation:
Any substance that contains only one kind of an atom is known as an element. Because atoms cannot be created or destroyed in a chemical reaction, elements such as phosphorus (P4) or sulfur (S8) cannot be broken down into simpler substances by these reactions
Example: Water decomposes into a mixture of hydrogen and oxygen, on the other hand, cannot be decomposed into simpler substances. They are therefore the elementary, or simplest, chemical substances elements.
Each element is represented by a unique symbol. The notation for each element can be found on a periodic table of elements.
The elements can be divided into three categories that have characteristics properties: metals, nonmetals and semimetals. Most elements are metals, which are found on the left and toward the bottom of the periodic table. A handful of nonmetals are clustered in the upper right corner of the periodic table. The semimetals can be found along the dividing line between the metals and the nonmetals.
