For once, I was able to search my busy mind and come up with questions based on the Chamber of Secrets.

I thought Ginny Weasley was the heir of Slytherin. I am apparrently wrong. If Ginny Weasley obtained Tom Riddle's diary, why didn't that mean she's the heir of Slytherin?

If Ginny Weasley did recieve the diary, and if Voldemort put part of himself in the diary, why wouldn't Ginny obtain the power to open the Chamber of Secrets?

When Ginny was shopping for school supplies she had a cauldron that she was putting her school books in. Lucius Malfoy tossed Tom's diary in the cauldron. Why did Lucius Malfoy give it to Ginny?Why not someone like Hermione?

In Moaning Myrtle's bathroom, the faucett that has a snake engraved into it is the entrance to the Chamber of Secrets. Does anything in Parseltounge grant accsess to the chamber?

Ginny's skeleton would have lied in the chamber forever, as said by Riddle.If Ginny had died, would her skeleton really remain in the exact same spot? Would it be unable to be moved?

She wrote to Riddle about regular eleven-year-old problems like boys. If she did this did she trust Riddle?

How did Tom Riddle or Lord Voldemort lose his power as Harry destroyed his diary?

What was Salazar Slytherin's original purpose for the Chamber of Secrets?

Ginny got the temporary ability to speak Parseltongue when Riddle possesed her but was not the heir of Slitherin because she could not control the Basilisk herself. Lucius gave the diary to Ginny because he knew it would be dangerous and gave it to her in the hope that it would hurt the Weasleys. I think that only the word open in parseltongue would open the chamber because Tom would have needed to shut it again when he was at school so he probably said something like close so it would shut again. I think he meant that nobody would have known where her skeleton was so it would have stayed there. At the begining she trusted hin but as she began to realise the truth she began to fear the diary. When Harry destroyed the diary the part of Voldemort's soul that was in there was killed so all the power it held in this world was destroyed. Salazar original purpose for the chamber was never mentioned, maybe it was where he liked to go down to and think, or maybe it was the original Slitherin common room, we may never know.

That one got me confused as well, I dont think that she was the heir, Riddle possessed her, she was doing his bidding, like writing on the wall, so she was not the heir as she was being possessed.
Hermionie would find out too quickly, he knew she was clever from Malfoy,her would Ginny was a Weasley and he hated them so giving it to Ginny helped him too. But what got me thinking was, why didnt she check her cauldron?
I think so, Harry wouldnt have known what to say if it wasnt anything, he would have been there all day.
No, I think that he just meant that nobody would get to the body, he probably thought that Harry would have been killed by the basilisk, then, nobody would get to her.
She probably didnt know he was bad, if you were writing to a person you didnt know, you wouldnt trust them but you wouldnt think that they were bad.
The parrt of his soul that was in there was destroyed so he lost his power that way.
It was never mentioned, maybe it was a place for muggle borns to go, as he didnt like them, or it might have been the origional Slitherin common room, we will never know.

Ginny did obtain the power to open the chamber of secrets. Lucius didn't give it to hermione because he knew that she wasn't stupid and she would easily figure it out, Her skeleton would lie in the chamber forever because nobody knew where the chamber was to move it and salazar slytherin intended to make that chamber to kill muggle borns in the future.

Most of these question are answered later in the series. But I doubt that Ginny would have literally stayed in the Chamber forever. And Lucius wanted to frame the Weasleys of having Dark stuff.

That was actually a good question, but I will go with everybody else's answers and take they're word for it.

I think Voldermort was silly to think that the book was going to somehow end up in harrys hands and not knowing he will destory it!!

Ginny got the diary form Lucius Malfoy it had nothing to do with the heir of slytherin.
Lucius gave the book to Ginny because he wanted revenge against the Weasleys because he had a grude against Arthur.
Harry said open up in parseltongue..you have to say open in orer for it to open.
They were not saying that her body could litterally not be moved they just meant that no one knew how to get down there and so after se died she would stay theere. It was just making a point that she would die.
Yes she did trust Riddle. She didn't know who he was she just figured it was some charm on the book
He lost his power because the diary was a horcrux and one of the ways that a horcrux can be destroyed is by basilisk venom. So the memory of Tom Riddle which was a projection from the diary was destroyed along with the diary.
Slytherins original purpose for the chamber was to kill off the mudbloods which he thought were not worthy to go to hogwarts.

Yes ..
They've given almost all info there ..
Most of your questions can actually be answered by the succeeding films ..

I'm going to answer all your questions right away!

1. She wasn't the heir of Slytherin. Tom was the heir, he used Ginny. He possessed her. That doesn't make her the heir. When Tom possess her, she would seem to be the heir.

2. Ginny did obtain the power to open the Chamber of Secrets. When Tom possessed her, she was the one who opened the Chamber and when inside it. But when Tom doesn't possess her, she can't.

3. Ginny is a fresher, that makes her a good choice. Lucius already knows that Hermione is one of the smartest girl for Draco had been talking about it the whole summer, possibly. So he wouldn't risk giving it to her.

4. Yes, one should order it to 'open' in Parseltongue. But I guess what you're asking is that can anyone do that? Well certainly not. Parseltongue is a very rare thing. Salazar Slytherin's family would be the only one's with Parseltongue(I guess so).

5. I guess he said that just as an expression and to emphasize it. Obviously it won't lie there forever, it would be spoiled. And it may have also been said to mention that no one can take her out from there.

6. Yes. She sort-of trusted him. It's Ginny, a 11-year old. New to Hogwarts, not used to be girly, grown up with boys. She didn't have anyone to share her thoughts with. When the diary presented itself, she was only too eager to tell it everything.

7. That is the whole theory of Horcrux. Tom is just a fragment of Voldemort's soul, his memory. Like in the other horcruxes, there weren't anyone coming out. This one was designed so. Probably it was the first one from Voldemort.

8. It purpose was to purge the school of all Muggle-born students and get rid of them.

These answers are up to the best of my knowledge.