Q: old email

Hello Sweettanya,

To make sure we are on the same page, you created a new Apple ID under a new email address. Now when you update apps, you are seeing a prompt for the old Apple ID password. Let's see if we can get this sorted out. 

Now because you have created a new Apple ID, you will need to delete those apps associated with your old Apple ID and then download them with your new Apple ID. The reason is that even though you don't use your old Apple ID, those apps that are currently tied to the old Apple ID. Following the steps that I previously stated will then link those apps.

One thing to keep in mind is that when doing that, you might lose data associated with those apps. For instance, a game with save data might be lost because they save within the app on your iPad, but something like Facebook would have the data saved on their end because you sign in with a username and password. 

Take a look at the articles below for details about removing content from your iPad as well as some general information about Apple ID's.

Delete music, movies, apps, and other content from your iPhone, iPad, or iPod touch
https://support.apple.com/en-us/HT204343

Frequently asked questions about Apple ID
https://support.apple.com/en-us/HT204161​

Let me know if this works for you or have further question about your issue with dealing with multiple Apple ID's

Take care