1)
Why does it say "Chat'u" and "Pash'u"?
1.
Malbim: "Pash'u" is in order to rebel. Even this, You will pardon!
2)
How will their captors have mercy on them?
1.
Radak: They will allow them to leave exile and return to their land 1 , like Koresh Melech Pras did.
2.
Malbim: [Due to their Teshuvah and Tefilah,] their captors will lighten the yoke on them.
1
Malbim: Shlomo did not request this, for they will return only after a known time, after the Brachah and curse take effect on them - "Ki Yavo'u Alecha Kol ha'Devarim
