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maria [59]
2 years ago
9

Why does potassium permanganate need to be standardized right before a titration?.

Chemistry
1 answer:
Ierofanga [76]2 years ago
6 0
To determine the strength of potassium permanganate with a standard solution of oxalic acid.
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To which planet do scientist compare to Kepler-10
Stells [14]
To Earth, since it has the same radio and masses. This is what I believe.
7 0
3 years ago
Explain how the electron configuration of calcium, Ca, would illustrate the Aufbau Principle.
lord [1]

Answer:

The Aufbau Principle simply helps us determine electron configuration of an atom by stating that in the ground state of an atom or ion, electrons fill subshells of the lowest available energy level, then they fill subshells of higher energy level. For example, the 1s subshell is filled before the 2s subshell is occupied. Now, when trying to figure out the electron configuration of a calcium, you need to know its atomic number to determine its amount of total electrons. Calcium has an atomic number of 20, which means it has 20 protons and 20 electrons. First remember that the "s" subshell only holds 2 electrons, the "p" subshell only hold 6 electrons, and the "d" subshell only holds up to 10 electrons. Using the Aufbau principle below, we can determine that the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons go in the 2s orbital. The next six electrons will go in the 2p orbital. The p orbital can hold up to six electrons. We'll put six in the 2p orbital and then put the next two electrons in the 3s. Since the 3s is now full we'll move to the 3p where we'll place the next six electrons. We now go to the 4s orbital where we place the remaining two electrons. With this, the calcium electron configuration will be:

1s^2 2s^2 2p^6 3s^2 3p^6 4s^2

Hope that helps you understand!

8 0
2 years ago
In which set of elements would all members be expected to have very similar chemical properties?
zepelin [54]

Answer:

each group of the periodic table.

example group 7 - fluorine, chlorine, bromine, iodine, astatine, tennessine

6 0
2 years ago
1. Because its structure is more complex,
Mashutka [201]

Answer:

Organs are more complex units than tissues. An organ is an organization of several different kinds of tissues so arranged that together they can perform a special function. For example, the stomach is an organization of muscle, connective, epithelial, and nervous tissues.

Explanation:

:)

3 0
3 years ago
Help with this pretty please!
inessss [21]

Answer:

10

Explanation:

Basically same as last question but the number is before the compound :)

6 0
3 years ago
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