You have to make an assumption or estimation here: (don't think about the 1.00 M KSCN)
Since 1.00M KSCN provides a common ion source of SCN-. Therefore, you will have a <span>1.00 M SCN-.
</span><span>[Pb+2][SCN-] ~ 0.01 x 0.02^2 = 4E-6
</span> Pb(SCN)2 <---> Pb++ + 2SCN- <span>
</span>Bringing 1.00M SCN- back in the problem. 1.00M + 0.02M, ignoring the SCN-, and calculating the <span> [Pb+2]:
</span><span>
</span><span>Ksp = [Pb++][SCN-]^2
</span>2.00E-5 = [Pb++](1.00)^2
<span>[Pb++] = 2.00E-5 M </span>
<span>The mass balance shows that: </span>
<span>[Pb++] = [Pb(SCN)2] </span>
So [Pb(SCN)2] = 2.00E-5 M in 1.00 M KSCN.
Answer: A heating curve graphically represents the phase transitions that a substance undergoes as heat is added to it.
The plateaus on the curve mark the phase changes. The temperature remains constant during these phase transitions.
Water has a high boiling point because of the strong hydrogen bonds between the water molecules; it is both a strong hydrogen bond donor and acceptor.
The first change of phase is melting, during which the temperature stays the same while water melts. The second change of phase is boiling, as the temperature stays the same during the transition to gas
Explanation: