A chemical change is a change that results in new chemicals (the reactants underwent a chemical change which resulted in new products).
an example of a chemical change is the burning of paper. An example of something that is not a chemical change is the melting of ice.
To test for hydrogen, burn a candle near the suspected source of hydrogen. If you hear a squeaky pop sound, hydrogen is present because when hydrogen gas burns, it makes a squeaky pop sound.
Explanation:
Let us assume that the given data is as follows.
mass of barium acetate = 2.19 g
volume = 150 ml = 0.150 L (as 1 L = 1000 ml)
concentration of the aqueous solution = 0.10 M
Therefore, the reaction equation will be as follows.
![Ba(C_{2}H_{3}O_{2})_{2} \rightarrow Ba^{2+} + 2C_{2}H_{3}O^{-}_{2}](https://tex.z-dn.net/?f=Ba%28C_%7B2%7DH_%7B3%7DO_%7B2%7D%29_%7B2%7D%20%5Crightarrow%20Ba%5E%7B2%2B%7D%20%2B%202C_%7B2%7DH_%7B3%7DO%5E%7B-%7D_%7B2%7D)
Hence, moles of
=
.......... (1)
As, No. of moles =
Hence, moles of
will be calculated as follows.
No. of moles =
=
(molar mass of
is 255.415 g/mol)
= ![8.57 \times 10^{-3}](https://tex.z-dn.net/?f=8.57%20%5Ctimes%2010%5E%7B-3%7D)
Moles of
= ![2 \times 8.57 \times 10^{-3}](https://tex.z-dn.net/?f=2%20%5Ctimes%208.57%20%5Ctimes%2010%5E%7B-3%7D)
= 0.01715 mol
Hence, final molarity will be as follows.
Molarity = ![\frac{\text{no. of moles}}{volume}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Ctext%7Bno.%20of%20moles%7D%7D%7Bvolume%7D)
= ![\frac{0.01715 mol}{0.150 L}](https://tex.z-dn.net/?f=%5Cfrac%7B0.01715%20mol%7D%7B0.150%20L%7D)
= 0.114 M
Thus, we can conclude that final molarity of barium cation in the solution is 0.114 M.
Answer:
Single Replacement
Explanation:
Single Replacement reactions are A + BX = AX + B. It's easy to tell if somthing is a single replacement reaction by seeing if it is a lone element like Sodium or Calcium