Since they have value to the family, I'd suggest contacting a good paper conservator. Someone trained can really do wonders.
Newsprint on what's usually an acidic page for a scrapbook isn't a happy combination. The home solution is making digital copies even taken with a phone is ok and if you're good at taking pictures can be good enough. Then mylar or something to preserve the originals as much as possible and only handling the copies.
Again, a good conservator can recommend other things even beyond deacidifying, that aren't stuff most people can do at home.
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